What is the difference between MsPacman and Pacman

Ms. Pacman has filled-in obstacles (allowing the field to be seen better) and is harder, because the ghosts move randomly and the power pellets stop working after a certain level. Ms. Pacman also runs out of coding at Level 256(?) and causes an infinite empty field. Also, the orange ghost's name in PacMan was CLYDE but in Ms. PacMan it is named SUE.