Viper Ultimate WINS vs. Logitech G903
I've owned both, and wanted to share some insights that I would have liked to have known before laying down this kind of cash for a mouse: Right off the bat, I need to say that the G903 is an excellent mouse but has a massive, fatal flaw: Logitech refuses to source an alternative to the frequently defective switches in its primary buttons. If you google 'G903 double click issues,' you will find that these switches fail at an alarming rate. This happened to me, after around 14mos for the original, 10mos. for the replacement under warranty. Logitech refused to replace the replacement. I consider this failure rate completely unacceptable for a "premium" mouse. My last mouse is 5+ years old and still going strong; I'm only switching because I wanted to go wireless. Personally, I will likely not trust Logitech for some time. If you're willing to take the risk, see below for a comparison. Performance Both of these mice are incredibly responsive. I would be hard pressed to tell the difference between wired and wireless modes on either mouse. Both sensors are excellent and perform well on all surfaces. Both of the mice have 5 steps of mouse sensitivity that can be individually modified by the user in the mouse software. I love this. The G903 has two dedicated buttons on the top of the mouse to move up and down between these sensitivity steps, which is much more convenient than the Viper's single button located on the underside of the mouse. I assigned one of the Viper's side buttons for this, but it's not as convenient. Ergonomics: Both of these mice are ambidextrous. (I'm left handed.) The G903's larger size and rounder shape is probably best suited for a palm grip, but I use a claw grip and was totally fine. The main thing is the G903 is a large mouse. People with smaller hands will likely find this mouse cumbersome. I slightly prefer the G903's side buttons, which protrude further than the Viper's which makes them a little easier to click, but this will be very subjective. The Viper is a little flatter, a little narrower, and a little shorter, and the form factor a little better for my medium sized hands. It's also a lot lighter. The G903 does have customizable weights, although I don't really see the necessity of this. Battery Life: The Viper is rated to have a much longer battery life than the G903, but I found myself charging both of these mice every 3-5 days or so, depending on computer use. The Viper does have the option to come with a dock, which I find convenient. However, the USB connection, though standard, is hidden in an extremely narrow cutout that most generic cables will not fit in. The G903 has a mousepad that lets you charge as you play, which is a cool idea, but it's expensive and really, as long as a mouse lasts a full day it's not that hard to charge at night. Wow, that was a long review. Never done one that long before. I just spent a ton of time researching and a ton of money buying these two mice, so thought I'd try to share some of that. Read more

















