Is the movement and ghost AI in the Super Nintendo Ms. Pac Man faithful to the arcade version?

Solution 1:

From the Ms. Pac-Man Wiki page:

The ghosts' behavior patterns are different and include semi-random movement, precluding the use of patterns to beat each level.

The page also mentions a few other changes to game mechanics, such as the fruit that now moves and multiple mazes, although there is nothing to suggest that the player control was changed.

From the same page:

The Mega Drive/Genesis, Master System, and NES versions, by Tengen, and the Super NES version, by Williams Electronics, took a few liberties.

Based on this information you should not expect Ms. Pac-Man to behave the same as the classic arcade Pac-Man.