He's got good acceleration. I think his top end speed isn't on the level of Walcott or Bellerin.
He plays an intelligent game and has quick feet so doesn't need to rely on speed like others. The great thing about him is his use of the ball. At this level you have to value possession of the ball and treat it like gold dust and this is what sets him apart from Ox. I think the senior players are also more confident in passing to him knowing he won't turn over possession and leave the team exposed.
Shame Campbell's endurance is still questionable. Having him and Iwobi out wide would've been the future.