I have the Sidewinder x8 as well, and this is hands down the best mouse I have ever owned. I honestly live in fear for the day that it dies on me. It is the only mouse where the side buttons are up and down--PERFECTION. The little magnetic cable to charge is a smart addition, letting me remove/plug back in with a single hand. I love this mouse, and as interesting as the specs are for the Gigabyte one are.... there is just too much that I would lose.