I too have a CM Storm Sentinel. Alot of people do not like the sensor on it. There have been issues in the past apparently with it not working properly. This gave it a bad name and it kinda stickes to this day. But I have never had an issue with mine. I have 5 different settings for mine. 800dpi, 1800dpi(default for the MX5), 3000dpi, 4000 dpi, and 5600dpi(for pwning noobs in BFBC2). I absolutley love this mouse. And the fact that each of my settings has a different color illumination helps me to know what setting I am at without having to look at the OLED screen. Its a great mouse and after some updates to the software and a few patches i believe that Coller Master managed to work most, if not all, of the sensor issues it was having with the Sentinel.
The Inferno is a culmination of the knowledge learned from the release and customer base of the Sentinel. Alot of people do not use the 5600dpi setting on the Sentinel and so CM dropped it to 4000dpi for the Inferno. I have no experience with the Inferno other than the reviews I have read. Its been getting great reviews. There's always going to be a few bad ones as different people expect different things from their hardware. Overall though the Inferno is doing very well.
for example i dont care about the LED and no one in the world can claim they are precise with 4k dpi. and i need to know if it has negative acceleration
alot of mice when you move them fast like in an rts or fps will feel like they are dragging behind which they are. its the fact that the mouse cannot track that speed and falls behind. that mouse you own is a twin eye which historically has had many lift issues and some vibration issues so id prob want to not go that rout. also the rat7 which uses that sensor had issues for me so nty