Predator. In the Alien vs. Predator video games, a Predator fought androids. Pred also has multiple different pieces of technology, and weapons at their disposal, and whileTerminator also has the same, most of it is stuff that Preds have faced before. The only exceptopn being the plasma rifle, which is pretty similar to the plasma caster.
Terminator has nothing that Pred hasn't faced before. Though, would Predator keep the endoskeleton 'skull' as a trophy?