My original Mattel electronic games are long gone, but when they started re-releasing them in the early 2000s, I started picking them up. They're mostly the same, but some of the sounds have changed, the one I noticed immediately was the CHARGE fanfare in Football II during kickoff and I think following touchdowns. I now have both footballs (green, whitish) baseball and basketball, and I think they did soccer and hockey as well.
Someone else mentioned how the newest football is all wrong, and I agree. I didn't like the sound effects and the ability to run backward. I loved all my electronic games when I was a kid, some of which were... the handheld sports games from Mattel, Simon, Atari Touch Me, Maniac, Electronic Battleship, Merlin, Digital Derby, Blip, P. E. G. S., Redline and many more that I can't think of right now.