If you're wearing a piece of clothing because of the prestige it holds and not because of how it looks on you, then you're wearing it for the wrong reason. What I'm saying is, you should wear it because it looks good, fits good, feels good, and they're of good quality.
By the way .. A&F is geared more towards teeny boppers and young adults... a totally different market compared to Lacoste's. AND! (if you're concerned about prestige) the A&F brand doesn't hold as much (if any) prestige as Lacoste.