my understanding of gators and crocs is that they're very opportunistic feeders, whatever they come across, if it could be edible, they'll try it.
In comparison to crocs, alligators as a group are less aggressive.
we have a pic. of my dad in Fl some years ago...he and my mom and her high school friend and friend's husband, took a trip down there, visited Sanibel Island....in the pic of my dad, he's standing in front of a gator that was meandering around the condo where they all stayed. Can't tell you how far in front of the animal he was standing. Another picture of them shows my mom and her friend at a alligator farm or some other touristy-type place where you can learn about the crocs and gators - they holding a very young gator, who has his mouth wrapped shut.
While they were down there, there was an attack by a gator on a dog who lived in one of the condo units.
They also took one of those airboat trips through the Everglades.