[Edi]

A 19' gator is a monster of epic proportions and you don't get too many of those. If you measure by length, equal length will always favor gator, because it has greater mass for the same length.

But most crocs and gators don't grow to such monstrous sizes. Neither do most pythons, in the wild anyway. Anacondas are substantially larger than pythons (thicker, more mass) even if they do not achieve the same length. I grant that the gators that anacondas hunt tend to be young ones.

I've never seen a live gator, but I've seen enough footage of various types of croc (including the Australian sea crocs that grow up to 35') to know just how big they are. Even Nile crocs can reach impressive lengths.With regard to that, even the big Nile crocs (12-15') stay away from hippos because the potential reward for tangling with one is not worth the risk of injury. They do attack young hippos when they can, though.