Question for anyone who owns a USA SSF2T board

I’ve got a Phoenixed SSF2X board (Phoenixing courtesy of Razoola), which has Razoola’s handy dandy “Phoenix Mini Menu” that allows changing region. I changed region from original (Japan AM), to USA. Myself and my partners confirmed the lack of Zangief’s one-hit air dizzy, which should be consistent with a true USA version of the game, so we feel satisfied that the region switch is at least somewhat legit.

We noticed that speed on certain levels varies from that of the rest of the game levels. Specifically, gameplay on Cammy’s level is slower, and gameplay on Vega’s (Claw’s) level is dramatically faster (like AE Turbo 3/4 speed).

We are curious if this is consistent with a “dedicated” USA version of the board. Also, is there anything else we can do to confirm the region switch, anything else that should be expected on a USA board which would not be expected on a Japan board?