Originally Posted by Mancubus
At 800 DPI it tracks fairly well and doesn't feel as laggy as the 400 DPI setting. AFAIK Logitech says that 800 DPI is the native value on the G400 and all the other steps are interpolated... so at 400 DPI every second count is discarded. I don't know whether its this or the fact that the frame rate is so much lower compared to the WMO... (5800 vs 9000). I definitely feel the WMO is smoother on its default settings compared to 400 DPI and 500 Hz on the G400. But I can't compare the WMO @ 800 DPI vs G400 @ 800 DPI because the WMO is limited to half of that. Another member of this forum shares a similar view to mine... that 800 DPI is the only usable setting and that if you are not a palm gripper that this mouse is simply unusable. In CAD it is indeed like holding a torture device. Also 45% lg with the WMO and just under 35% with the G400 vs nightmare bots is a BIG difference so its not like I am imagining things, 10-15% accuracy is huge.
800 and 3600 (4000) resolution counts are native registries. 400 and 1800, or 2000 (S model) are halved and recalculated on controller level. This can cause a slight delay feel and is common among many mice, not including any external changes to actual code. All variations of Deathadder do this as well.
I have a few 6000 and 9000 FPS intelli's. Both feel rather good and the change is negligible to me, though I understand what you mean by smoothness when it comes to switching out to an entirely different architecture and or tracking code. PS: Maximum G400 framerate is 6469, not 5800 (Over driving LED may or may not raise this), though as I mentioned earlier, this is dynamic and fluctuates to optimal range.
Basically, other factors play a significant role. I don't believe your issue is limited to sensor, but rather shape, comfort and weight.