MM's speed was recalced at High Hypersonic, so im waiting for your opinions
if speed isn't equalized, Michael holds a several thousand or more speed advantage, BUT it's arguable if he could even kill Jason, as he's got immortality 2, 3. 4 and 7, coupled with his regen to freshen him up leading to Michael can't really do any meaningful damage, what damage is dealt is regenned, and if actually killed, he'll just resurrect, something else important to note, is everytime Jason goes down, he comes back stronger and better than last time, so Michael would unironically be making jason stronger if he does manage to put him down.
meanwhile, all Jason needs is to either infect Michael with the Jason strain (which is easy cause they'll be in melee range with each other for most of if not the entire fight, all it takes is for Michael to touch the slime Jason is emitting.) Jason is way more versatile and weirdly enough can also outrange Michael as he can basically just summon whatever weapon is most effective in the moment, including pulling back to snipe with guns, ironically, this Jason is also the better assassin as he has stealth mastery and feats of disappearing and reappearing (this could lead to Jason changing strategies and teleporting away, then stealthing, and then blowing Michaels brains out from a distance) and while his combat speed is MHS, is travelling speed is only subsonic, which get's mitigated by Jason's teleportation. Alongside this, he has a 5x LS advantage, which means, all it takes is for him to grab Michael ONCE and then he pulls him apart like legos. This also is not including that while Jason has that laundry list of immortalities, this Michael does NOT, he only has his type 4, and he has no regen, which means no matter what the longer the fight goes on, the more damaged he's going to be, leading to loss of effectiveness, agility, speed and etc every time he gets hit, and that's NOt including things like instant infection and ripped limb from limb.
Literally it all comes down to Michael making one (1) mistake, and paying for it with his life
Something else I want to bring up as ive been looking at Michael Myers novel stuff and a lot of his abilities just seem to be misunderstood, for example, the "sleep inducement" is literally implied to just be Michael drowning her while the lights were off, they even perform CPR and she coughs up water, and it's not a "gas balloon explosion" he survived, it was leaking oxygen tanks in a small room.