Originally Posted by
Tanooki
I've brought up input lag before more than once. It has been looked at, and it's not the system, at least not at a basic level. It is possible you could hit an emulation hiccup if the hardware and the OS decide to randomly do something dumb (like Windows always does all the time.) The controller if anything that comes with it should have more lag if any than a legit one directly into the port because you're dealing with bluetooth.
Something to consider, you're thinking the SNES is the hefty one here, but it's not alone. You got the Genesis which while less complex in the audio and visuals is on the main cpu clocked notably faster. Also there's the GBA which I guess depending on how they did it could be less or more taxing than any as it's a 16mhz ARM7 chip in there, a much more basic ARM chip than the R5 uses.
I'm not saying you're wrong, but it could be your TV causing it or a preception problem. Did you turn off any form of processing, filtering, or other garbage on your tv and pop it into game mode? None of these games other than the GB stuff were made for a LCD screen so they do not account for input lag so they're overly sensitive.