advanced just feels more realistic than manual. with manual pretty much every players shoots like rockets, no matter which foot. also sometimes the animation is missing and the shot looks like a pass. and the most important thing: you can't really do intentional low shots like this one:
i don't think this finish (downward shot) would be possible with manual or basic. yes it could happen, but you can't tell the game to do it without advanced. (aiming away from goal)
another example of a beautiful low shot with advanced:
Special shots are triggered also in manual, but it seems more difficult to control. Inside the box i only use A/Y to shoot low, but at long range you can use sprint button + shoot with low power to make a low shot. Would be better to have a specific button to force low shots, though.
I don't really like the way advanced shooting works, it's very unintuitive.