They play against much more organized defenses and way better goalies. The whole opposition is so well versed in what to game plan for.
Less time and space. It's really hard to compare. Everything looks better when the opponent gives you more.
Plus 87+71 are relied on much more defensively.
I'd argue Sid does more from a leadership perspective than Mario, who was pretty quiet. Sid communicates on the bench all the time.
There's still a strong case to be made that Mario and Jagr just had better killer instinct in the O-zone though. Better hands. Mario's a better passer than Sid, all things considered. He was more careful with possession. Didn't make low percentage plays as frequently. Was more patient.
66+68 were more willing to make east-west plays too, which was less discouraged at the time I guess too.
It's hard to top Jagr's stickhandling in tight against goalies as well. Mesmerizing.
There's no way to sum this discussion up quickly. It would have to be an essay