The spec sheets have converged, so stop reading them
For most of the last decade you could pick a flagship wireless mouse on numbers. That era is over. As of September 2026, Logitech publishes up to 8,000 Hz LIGHTSPEED polling and up to 95 hours of battery for the G Pro X Superlight 2; Razer publishes 8,000 Hz through the bundled HyperPolling dongle and up to 95 hours at 1,000 Hz for the Viper V3 Pro. Both list at $159.99. The remaining differences on paper — 44,000 DPI versus 35,000, 888 IPS versus 750 — are comfortably beyond anything a human hand produces.
We should say plainly what this article is not. We do not own an oscilloscope, and we have not measured click latency, sensor deviation or real-world battery drain. Anyone quoting you a figure like “0.12 ms click latency” for these mice is repeating a marketing number or inventing one. Every figure on this page is the manufacturer’s own published specification, labelled as such, and the bars beside them are simply those published numbers placed on a fixed scale so the two cards line up visually.
What is left to decide on is the part the spec sheet cannot express: shape, switch feel, and what is in the box.
Shape is the whole decision
The Superlight 2 keeps the shape Logitech has been iterating since the original G Pro Wireless: symmetrical, with a gentle hump roughly in the middle and sides that taper inward. It is the closest thing the category has to a default. Palm, claw and fingertip grips all work on it, and if you are buying without being able to hold one first, that breadth is worth more than six grams.
The Viper V3 Pro is flatter through the back with more pronounced, straighter sides. That suits claw and fingertip grips very well and gives your fingers more to push against during a flick. Palm-grip players with larger hands often find there is less to rest on, and no amount of sensor specification fixes that.
If you want to see the outlines overlaid rather than described, our mouse shape comparison tool lets you stack the two silhouettes and scrub between them at a common scale.
Switch feel: hybrid versus pure optical
Logitech’s LIGHTFORCE switches are a hybrid optical-mechanical design rated for 70 million clicks. Razer’s are pure optical Gen-3, rated for 90 million. Razer’s rating is higher; Logitech’s click is the more tactile of the two.
This is a preference, not a ranking. Pure optical switches feel light and fast and avoid mechanical debounce entirely. Hybrids give you a crisper, more defined break that a lot of players find easier to control for single precise clicks. If you have ever thought a mouse felt “mushy” or “too easy to misclick”, you probably have an opinion about this already.
The polling-rate footnote nobody prints
8,000 Hz polling is the headline on both boxes, and it comes with two caveats worth more than the marketing.
First, on the Razer, high polling has a published battery cost: 95 hours at 1,000 Hz falls to roughly 17 hours at 8,000 Hz, by Razer’s own figures. Second, on the Logitech, the 8,000 Hz ceiling depends on which SKU and receiver you end up with — current listings advertise 8K polling, but Logitech also sells the PRO LIGHTSPEED receiver separately as an accessory, so read the box rather than the category page.
And the honest framing for both: the jump from 1,000 Hz to 8,000 Hz is a real but small change that also raises CPU overhead. It matters to a ranked player on a high-refresh monitor. It will not change your aim.
Who should buy which
Buy the Logitech G Pro X Superlight 2 if you cannot try a mouse before buying, if you palm-grip, if you like a click with some bite to it, or if you want the POWERPLAY mat option so battery never enters your life again. It is the safer of two very good mice, and “safer” is the right criterion at this price.
Buy the Razer Viper V3 Pro if you already know you prefer a flat, low shape, if you claw or fingertip grip, or if you want the 8,000 Hz dongle guaranteed in the box without a second purchase. The six-gram saving is genuinely noticeable in a flick-heavy game once you have adapted to it.
Buy neither at list price if you can help it. Both are $159.99 on their manufacturers’ own pages and both go on promotion regularly — at that point the decision goes back to shape, which is where it belonged all along.