I always thought Vermaelen was highly overrated. In his first season he managed to score a lot of goals which made the general opinion forget about his poor defending. He really is not Barça material, he is probably at his top now.. in a club fighting for 4th spot every season. When Arsenal turned it up a notch in the second half of the season he even lost his spot. I'm a not surprised.
Vertonghen is definitely better, but is he Barça material? I'm not sure. I don't think he has what it takes to be a starter at such a big club, but considering our poor defence this year let's just say he is easily as good as all CB's we have now
He would be a great squad player to cover the LB & CB positions. Especially if Adriano leaves.