Just to clear things up with WW versions in HSF2. They are based on the last Japanese revision of WW (Japan 911210) and Guile did have one version of Flash Kick and Boom for all buttons. Somehow this is the glitchless version of WW that nobody played except in Japan.
I’ve found on Mame that the HSF2 speed seems a good bit faster than ST (X), both set to T4. Is that just an emulation glitch or was the game authored to be faster?
I think the game is faster than regular ST, as well as the fact that emulated SF2 roms run faster than original arcade hardware. Fortunately, in MAME, you can lower emulation speeds to match. I think the magic number was 96% or 97%.