Difference is that one suggestion is reasonable and well-argued and in the best interest of the sport. The other one is stupid and intuitive. Guess which one Platini has decided to back in public and which one he's actively been undermining for years?
Put it this way: give the referee the benefit of a video replay and he won't need to send players to the sin-bin just because he might feel it's too rash to hand out a red card or a second yellow or whatever.