To me, pro vs ammie ride has nothing to with talent and everything to do with personality. The pro ride is less forgiving, needs more exacting riding to perform while the ammie ride will give you what you want without the same precision. a REAL ammie ride is psychic.
For example, we used to talk about how my mare was more of a pro ride because you did have to be exact to the fence. By the time I retired her, she wasn’t so bad but still you had to ride every fence. BUT she topped out at Training level eventing/about 1st level dressage. Her conformation and talent just didn’t lend itself to upper levels.
A horse I rode for a while could go from a Training level event, do a 2nd level dressage test, then tote around a beginner. He did need a bit of a tune up to go back to the higher levels but if you pointed him at a fence and then scared yourself, he would still jump it smoothly.
You can make the argument that athleticism makes a pro ride in certain circumstances - a horse currently living where I keep my mare is so athletic when he spooked once it was the only time I felt launched and you could see where Ianded in the sand compared to where he spooked and it was a good 10+ft away (I probably did not fly 10 ft once you account for how skid marks happen but it was obviously not a drop off). When I asked him to canter, I have to hold on because he jumps into it with such energy, I feel like he leaves me half the arena back. Even my trainer has some issues with him - partly because he’s also a big guy (16.3, if I recall correctly). He is otherwise a really sweet horse but young - he rarely spooks but when he does…