I've used both a 500 and 700, not the 510. It shouldn't matter as my issue with these mice was the dpi (800) which remains the same on the 510, not the speed at which they could track motion. So yes, I can plainly tell the difference in dpi between an MX and a Boomslang 2000 because of smoothness of perceived motion during a 180 spin, and during very minute pinpoint movements. I can also sense a bit of improvement with the Viper over the MXs, though it is very slight. It is however enough that combined with my personal opinion that the Viper is more comfortable than the MX, I'm going to continue to use it instead of my Boomslang for at least the time being and see how I adjust to it.