Arcade AC runs at normal speed. All console ports of AC run above normal speed. When you go from console to arcade, do everything slower. From arcade to console, do everything faster. All the frame data is still consistent, since it's all relative. But I think the console ports are running above 60fps, which is why alot of 1frame stuff is so hard to do, when it was never that hard to do prior to the AC ports. And try not to center your timings on sound.
And the speed difference changes the strategy a little bit too. It goes back to being more about space control and baits, less about forcing mixups and rushdown. Since arcade is running at normal speed, reversals are easier to do and mixups are easier to react to.
If you have a good computer, then you can emulate AC. Otherwise you're stuck with the ps2 ports. What I do when I'm gearing up to play on arcade is I play GGSlash. Or I just don't play GG for a month or so, and let my old muscle memory resurface.