Jump buttons are f*cking stupid. Only a god damned motherf*cker would like a jump button. Seriously, a jump button? Please. The jump button totally destroyed Legendary Axe 1 and 2. And Shinobi. f*ck that. Ghouls 'n Ghosts was also super f*cktastic with its jump button. Why does anyone need a jump button when we have the up direction to press? That's why Atari 2600 controls ruled. Just imagine how much better Legendary Axe 1, 2, Shinobi, Ghouls 'n Ghosts and hundreds of other games would play with an Atari Joystick. The Turbo is a better system than the Genesis because it has FEWER BUTTONS! Yeah. I can rationalize any weakness into a strength if you give me the chance. Do not underestimate my fanboyism.
Seriously though, I think the Genesis version of Altered Beast wins in the backgrounds department (with the exception of them not becoming black and white during boss fights), and the PCE Altered Beast wins in the sprites department.