I think Jason can take this mid diff
Michaels regen, immortality and pain resistance is annoying, but that's really it.
Jason's regen is far more potent than Micheals' and his numerous forms of immortality guarantee that he will outlast Micheal should he be injured
Jason has supersonic reactions and subsonic movement speed, which will allows him to absolutely blitz the subsonic Michael in h2h, and teleportation will let him get the drop on Micheal easily, despite his prep time (you should probably equalize speed to make it fairer)
Jason also is physically stronger, as casually punching through steel, ripping a human in half, and flipping over a car >>>>>>> piercing a skull with your thumb.
Michaels durability feats actually match Jason's strength quite well, but given his skill and speed, he should be able to overcome it easily.
Skill goes to Jason as well, as he's fought through hordes of cops, military soldiers, government agents who had prep and knowledge on him, Ash Williams, and freaking Freddy Krueger. His experience and skills simply outmatch Micheal here.
They're pretty even in intelligence, as a lot of their feats are pretty similar (set traps, outmaneuvered people, etc), but even with prep, Micheal doesn't have much going here. Jason has an intelligence boost from Freddy, which allowed him to recognize a trap set for him by government agents with knowledge on him, and Jason still managed to get the drops on the guys. Jason's teleportation, speed and senses will let him bypass any traps that Micheal sets by simply just teleporting to him.
Jason also has a lot of abilities going for him, and if Micheal should somehow reduce Jason to chunks and overcome his regen (which is unlikely given the reasons above), the heart hypnosis will be the death of Micheal.
Overal, I vote Jason via strength, speed, skill, regen, intelligence and abilities