Rimbaldo,
The main difference is the trimpot being located on the motherboard so you don't have to adjust the drives with the small trimpot that was on the G250X. Aside from that, we massaged the short circuit protection to prevent false positives and changed out the fuse from 7A to 10A in the process. Nothing too major and it will work just as well as a REV8 once it is adjusted for smoothness with the G250X mounted trimpots.