Is there any other use of experience points except that it speeds up gaining TC which reduces the malus on performance quicker?

Does a player with a higher bpos rating at positionA take a longer time to gain rating points at positionB?

If you have 2 players P1 and P2 with the same rating at a postionA,(lets say 2) but one of them,P1, is listed at some other positionB (obviouly rating for that position >2), does the game engine add an extra malus to P1 (bcos he has a higher rating @ positionB)
In other words if all the other pertinent skills, talents(constants) were the same will P1 perform worse than P2 going against the same player?

My exp suggests the answer to all the 3 questions above is No, but then again.....