Fuzzerd is correct, because of all the backtracking necessary to recollect 50 rings after each stage, it is overall slower to get super sonic on EHZ. Ideally your route should collect 50 rings before any given lamp post with minimal time spent not moving right at high speeds. To this effect, it is probably faster not to get more than 1 emerald per act of any given zone, and definitely better not to get more than 2 or 3. There is still plenty of time to collect them, this way you can get ~2 seconds detours on 5-7 levels (10-14 seconds total), instead of the ~40 seconds of detours on necessary to get all the emeralds in EHZ. Additionally, this preserves more of a sense of speed in the TAS, and more of the sense of the game's flow, by minimizing the frequency of interruptions.
With Knuckles, the all-emeralds-on-EHZ route would be a bit more viable, because he doesn't lose all his rings upon entering a special stage, but it would still be faster to save at least two for CPZ.
Incidentally, the
Sonic 2 maps at The Sonic Center were recently updated with a batch I made. 100% scaled, all rings and objects shown, with hitboxes and solidity.
They should be quite helpful for route planning. (except sky chase).