http://www.oohtobeagooner.com/clear-evidence-that-koscielny-is-just-not-good-enough-for-arsenal/ .................
He needs to learn the offside trap better, but that's nothing major. Vermaelen himself isn't that good at playing the offside trap.
Veraelen makes up for that with his takling, reading of the game and ball play, kos is good at reading the game but needs work on most other things, he can develop into a top defender, one of the best if a team like arsenal got him a few years earlier.
Errr, yeah and Koscielny makes up for it with his brilliant game reading, tackling, passing etc. It works both ways y'know?! The only thing Kozza needs to work on is the offside trap routine.