The 2 are about the same with minor differences.

Player A: is average in everything except he has high potential in stamina starting in the mid 70's. 10 point better rebounding and 20 point better passing.

Player B: Has high speed potential but currently is even with player A. Low passing potential that starts pretty low. High stamina potential but starts in the mid 50's.

Is the high speed potential difference enough to overlook the passing and stamina issues?

Neither if possible. I'd look for high potential in ATH as a top priority.

So would you take a SF who has lesser abilities for a really high ATH or would it be better ot go after a mid range ath SF with mid range or high abilities?

I've always been under the impression that a fast SF was the way to go which then raises the next question, if i can get one with high Ath and decent abilities, where would speed stand in the importance order?

You need 2 sf's I would get one with high ath, high spd, high reb, the other with high ath, high spd, high per thats what I do