GTX 285 Vs GTX 260 Black edition

I recently got a BFG GTX 285 1GB DDR3.I picked it myself and thougth that was a good purchase until one of my mates started saying that is GTX 260 was pretty much the same and he paid a whole lot less for it.

Now,i´m no expert in the matter but i assume that a graphics card that as a 702mhz core clock,1584mhz shader clock and 1332mhz memory clock is better than one with 666,1128and 1092mhz respectively...(bias was taken from evga percision).

I it just like this?Or did i made a bad purchase and my friend is dead right?

PS:I guess is 260 as some sort of special overclock(mine as also)for that version...Maybe it does compensate bias because of it.....?

Thanks coozie7,i´ll be sure to tell i´m that

Thanks jaguarskx.i apreciated