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The competition
For a comparative reference, I used my own G502 Proteus Core, one of  Logitech's latest gaming mice.

The G502 has a few features missing from the X5 and X10. Most notably, it includes Logitech's trademark clutched scroll wheel, which can be switched from clicky to free-wheeling modes on demand. There's also a "sniper" button that drops the mouse tracking sensitivity to its lowest setting. The G502 weighs the same as the Torq X10, but it's longer and wider than both EVGA mice. At $68, it's priced to go toe-to-toe with the X10.

The setup
The Torq X10 and X5 are billed as gaming mice, so what better way to evaluate them than to play a game? I tested with Counter-Strike: Global Offensive, which requires precise mouse movements to be competitive. (I'm usually not, but one can dream.)

I discovered early on that the Torq X5's optical sensor doesn't track well on the white melamine surface of my desk. I normally don't use a mousepad, but to make the X5 usable, I pulled out the super-cool mouse mat that Asus includes with its Crossblade Ranger mobo. I used the same mat while testing all three mice.

To eliminate as many software variables as possible, I disabled Windows' "enhance pointer precision" setting. I also turned off the acceleration features in each mouse's driver, and I disabled CS:GO's built-in acceleration, as well. After making these tweaks, I tuned each mouse's DPI settings for comfort, settling on 800 DPI for all three.

Putting the PTFE to the mousepad
Going into this review, I wasn't expecting to find a whole lot of difference between these mice. I've always used Logitech mice without complaint, so I figured the G502 would emerge the uncontested favorite. Boy, was I wrong.

The Torq X5 was the surprise favorite in my tests. This featherweight mouse feels a bit insubstantial out of the box, but it's brilliant to use. The lack of weight makes the X5 easy to flick around, and the light touch of the buttons lets me quickly translate enemy sightings into semi-accurate bursts of bullets. At my best, I felt like I was wielding a wickedly precise rapier, compared to the more broadsword-like X10 and G502.

The X5 wasn't without its downsides, though. Its glossy finish can get slick with sweat after long gaming sessions, and the pearl-white paint quickly becomes grimy with skin oils. The grime is nothing a microfiber cloth won't fix, but it's not pleasant to look at. At least the X5's textured, rubbery sides provide a sure grip.

The Torq X10 was my second-favorite of the three. Even though it weighs the same as the G502, most of its mass is concentrated in its metal base, giving the mouse a very low, stable center of gravity. It's an exotic sports car next to the more truckish G502.

Although the X10 and X5 both use the same Omron switches, the X10's buttons have a small amount of dead travel before they register a click. As a result, they felt less sure in CS:GO, and they seemed to tire out my hand faster in general. Those who prefer more deliberate-feeling buttons may prefer the heavier touch required by the X10, though.

As it happened, the G502 ended up being my least favorite. Its center of gravity feels weird compared to the EVGA mice, probably due to the elaborate scroll wheel mechanism inside. The positioning of this mechanism seems to shift the center of gravity up and toward the front of the mouse. The relatively thin left mouse button isn't as easy to hit as the more generous buttons of the EVGA mice, either, though Logitech's switches do feel light and responsive.

The G502 could also do with fewer grams of weight to start. Adding some of the optional weights seemed to lower the Proteus Core's center of gravity, but it also made mouse the heaviest of the bunch, at 4.5 oz (127 grams). That may not sound like a big deal, but loaded with weights and stacked up against the lighter Torqs, the G502 felt less nimble all around.

Mice get used for more than just games, of course. Pushing pixels around in Photoshop and selecting reams of data in Excel are considerably less taxing than fragging enemies in CS:GO, and the perceived differences between the mice narrowed as a result. The lighter Torq X5 is easier on my RSI-prone wrist, but the X10 and G502 aren't burdensome. All three handle the slow, precise movements of my non-gaming work with equal aplomb.