CPU shot vs User shot

what's the difference between the two? I heard from someone that cpu shot is closely based on the ratings of the players, which makes it harder to score. is this true? which one should i use to have a more realistic game?

In User Shot, you control the jump for a perfect shot.

In CPU Shot, the CPU control your shot, it's a perfect shot.....

I'm use USER SHOT, it's more realistc....for me...

In CPU Shot, the CPU control your shot, it's a perfect shot.....

Cpu controls the release of the shot, it is crap, not perfect at all.

When Shot Control is set to CPU, the likelihood of a shot going in is completely determined by the player's ratings. When set to User, the timing of your release is significant in determining whether or not the shot is good.

so if i want to play a game based on the actual ratings of my players i should use cpu shot. is this correct? do the ratings mean nothing when using user shot?