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HMX EVA vs. Bsun Tomcat (Heavy)

An in-depth look at the HMX EVA and the Bsun Tomcat (Heavy) switches—which one is the best fit for you?

Overview

When it comes to selecting the perfect mechanical keyboard switch, the HMX EVA and the Bsun Tomcat (Heavy) linear switches stand out as two compelling options, each catering to different preferences and typing styles. The HMX EVA, inspired by the vibrant colors of Evangelion Unit-01, not only provides a silky smooth typing feel but also boasts a resonant sound signature that enhances the overall experience, making it an excellent choice for those who appreciate both aesthetics and auditory feedback. On the other hand, the Bsun Tomcat (Heavy) is designed with Ly stems, offering a super smooth typing experience that's ideal for users seeking rapid keystrokes and effortless transitions, complemented by its own resonant sound profile. While both switches share the linear category and a focus on smooth performance, their unique characteristics make them appealing for different reasons. However, let's dive in a bit deeper beyond generalities so you can best decide on the right switch for you.

By the numbers

Technical specifications

Actuation force

42g

Actuation force

55g

Bottom-out force

48g

Bottom-out force

64g

Pre-travel

2.00 mm

Pre-travel

1.95 mm

Total travel

3.60 mm

Total travel

3.60 mm

Factory lubed

Yes

Factory lubed

Yes

Stem construction

Standard

Stem construction

Standard

Stem material

T2

Stem material

Ly

Top housing material

Nylon

Top housing material

Polycarbonate

Bottom housing material

Nylon

Bottom housing material

Nylon

Mount type

PCB (5-pin)

Mount type

PCB (5-pin)

Spring

22mm single-stage spring

Spring

Extended spring

Housing materials

The HMX EVA and Bsun Tomcat (Heavy) showcase a striking contrast in their top housing materials, which significantly influences the sound profiles of each switch. The EVA utilizes a nylon top housing, which is known for generating a more subdued, deeper, and fuller sound. This characteristic arises from nylon's softness, enabling it to absorb sound more effectively than harder materials. Consequently, the EVA provides a typing experience that feels smooth and sound-dampened, appealing to those who prefer a quieter keyboard environment. In contrast, the Tomcat (Heavy) features a polycarbonate top housing, which offers a crisper and higher-pitched sound profile. The inherent stiffness of polycarbonate enhances sound resonance, resulting in a more vibrant auditory feedback when typing. This distinction in materials leads to a clear division in the auditory experience between the two switches, with the EVA leaning toward warmth and softness while the Tomcat (Heavy) emphasizes clarity and sharpness.

Both switches, upon closer examination, exhibit similarities in their bottom housing material—Nylon. This shared material choice results in an identical foundational sound character for both models. The nylon bottom housing further contributes to the deeper and fuller sound profile that players experience when bottoming out a key. Essentially, this means that while the EVA and Tomcat (Heavy) diverge in top housing materials, they converge in their bottom housing, providing a uniform typing feel and deeper sound when keys are fully pressed. For users prioritizing a rich and immersive tactile experience, both models still deliver on that front, even with their disparate top housings.

In light of the differing top housing materials and match in bottom housings, the overall sound profile brought forth by each keyboard ultimately hinges on how these elements interact. Since the nature of the sound while typing is influenced by both the top and bottom housings, the EVA and Tomcat (Heavy) can achieve similar results in terms of the bottom-out experience despite their disparities in top material. The nylon used in the bottom housing effectively mediates sound impact in both cases, ensuring a fuller auditory experience as users type. However, the inherent qualities of each top housing material shape distinct sound experiences upon release—demonstrating that while materials set the foundation, their interplay shapes the final user experience.

Weight

When comparing the actuation and bottom out forces of the HMX EVA linear switch and the Bsun Tomcat (Heavy) linear switch, there are notable differences. The HMX EVA features a lighter actuation force of 42 grams and a bottom out force of 48 grams, making it a suitable choice for users who prefer a more effortless typing experience, particularly during extended sessions at work or gaming. In contrast, the Bsun Tomcat (Heavy) linear switch has a considerably heavier actuation force of 55 grams and a bottom out force of 64 grams, appealing to those who favor a more substantial tactile feedback while typing. This variance in force preference can significantly affect the typing experience; lighter switches like the EVA allow for faster keystrokes with less fatigue, while the heavier Tomcat switch can provide a reassuring resistance that some typists find satisfying. Ultimately, individuals must choose based on their preferences for either a lighter or heavier feel in their typing experience.

Travel distance

Both the HMX EVA linear switch and the Bsun Tomcat (Heavy) linear switch feature the same travel distance of 3.6 mm, meaning that the distance traveled from the top to the bottom is identical for both switches. As a result, users can expect a similar tactile experience when pressing down on the keys, as both switches will provide the same resistance and feedback throughout their stroke. This uniformity ensures that the performance and feel of each switch will be closely matched, making either choice suitable for those who prioritize consistent travel distance in their keyboard experience.

Price comparison

Which switch is more bang for your buck?

The HMX EVA has an MSRP of $3.50 per 10 switches. At Milktooth, we are able to pass on savings to our customers and offer the EVA for $2.99.

The Bsun Tomcat (Heavy) comes in at $2.99 per 10 switches.

Here at Milktooth, we offer the best prices on switches (on average, 27% lower the competition). In addition, we offer free shipping on orders over $49.00. We also offer free returns and exchanges, so you can shop with guaranteed satisfaction.

That said, while price is an important piece of the puzzle, our opinion is that you should ultimately pick the option that most suits your unique preferences since you’ll be using these switches for years to come. In other words, finding something perfect for you is, in our view, the most important criteria.

Typing experience

In terms of sound, the HMX EVA linear switch is characterized by its resonant sound signature, delivering a pleasant auditory feedback that adds an engaging layer to your typing experience. Similarly, the Bsun Tomcat (Heavy) linear switch also features a resonant sound profile. This similarity suggests that both switches offer satisfying acoustics, which can enhance your overall typing satisfaction, although the exact character of the sound may vary based on your choice of keyboard and keycaps.

Regarding feel, the HMX EVA switch boasts a silky smooth typing experience, making it particularly enjoyable for extended use. In comparison, the Bsun Tomcat (Heavy) incorporates Ly stems, which are renowned for providing a super smooth typing sensation. With both switches emphasizing smoothness, users can expect a fluid typing experience with either option, ideal for those who appreciate seamless keypresses without tactile interruptions.

In conclusion, the HMX EVA and Bsun Tomcat (Heavy) linear switches both offer compelling auditory and tactile experiences. While the EVA is celebrated for its silky smooth feel and resonant sound, the Tomcat shines with its Ly stem smoothness and equally resonant audio signature. Both switches can cater to users seeking a refined typing experience, making them excellent choices for newcomers exploring the world of mechanical keyboards.

Conclusion

To conclude, the choice between the HMX EVA linear switch and the Bsun Tomcat (Heavy) linear switch ultimately depends on your personal preferences and typing style. If you prefer a lighter touch and a more agile typing experience, the EVA switch with its 48-gram bottom-out force is ideal for you. It offers a silky smooth feel, making it great for long typing sessions or fast-paced gaming, and its unique sound signature adds a distinctive character to your keyboard. On the other hand, if you're someone who enjoys a more substantial tactile feedback under your fingers and prefers a slightly heavier pressing action, the Tomcat (Heavy) switch with its 64-gram bottom-out force will be more suitable. This switch is designed for those who appreciate a robust feel and smooth operation, making it well-suited for both typing and gaming tasks. In summary, if you value a lightweight experience and a more expressive sound, go for the EVA; if you lean toward a more robust feedback and a heavier actuation force, the Tomcat (Heavy) will serve you better. Your final decision should align with the typing experience you find most enjoyable.

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