So which one should i get? rival 106 is a bit more expensive, both have very good reviews. rival 106 has a TRUEMOVE1 Sensor and deathadder 2013 has Avago3988. I like the look and shape of rival 106 and its also 26 grams ligher than the deathadder, deathadder is 106g and rival 106 is 80g. ALSO the important thing is that deathadder doesn't have a dpi switch button while rival 106 does, it also can be customized up to 7200 dpi, while deathadder's max is 6400.