Wilshere had three stages last season. The period before his england debut was meh, to say the least. He stepped up a level after that and then kept progressing until he put in a world class performance against Barca. Still, he was a defensive liability but that seems to be okay at Arsenal, so I'll leave it.
Ramsey had iffy performances until he got a run of 4-5 games and he was the best young midfielder in the league leading up to his leg break. This season he has been good and declined to being terrible, but more importantly, nowhere near the level he was showing then.
As it stands, Wilshere has shown a higher peak but he gets a pass on the poorer games because he has elegance on the ball. A bit like Fabregas really who was 'better than roy keane' in his first season; was he fuck.