Well, ya, but lets look at it like this 90% chief would win, not because he is a spartan, but because he is the good guy. If its like any Jason movie, they will end with a big fight, it will seem like Chief won, they will go on. Then we will find out Jason is still alive somehow. But, in the movie Jason would still have killed like 25 marines first.
I dont know man, the Jason X version got up after having his arm, leg, and head shot off. Plus, its hard to tell but I kinda think they might be about the same strenght. Jason can punch down space ship doors, Chief cant do that.