Similar age when they broke through, same league, both quick and both like to dribble .. James does it less but it's one of his key attributes. And their productivity is very similar. But yeah, just pace?
I've already said, Adama has an issue with overplaying his dribbling ability, James has that ability (not to the same extent, but he does have it) but prefers to pick a pass. That doesn't make them completely different players, I've watched both extensively in the championship and there are numerous similarities in the way they play. You can deny that if you want, that's fine, but I'm really not just saying they're similar because pace. Having watched both of them I feel they've had similar progression paths and overlapping attributes.
Again, I'm aware that Traore attempts more dribbles and James more passes. That's a) because Traore is not a particularly intelligent player and b) because the Middlesbrough side he played in was very direct and used Traore as an outlet, whereas Swansea are a team who emphasise the passing game (still more so than anyone else in the championship). If James played for that Middlesbrough side (who were quite defensive, very counter oriented) you would have seen his attempted dribbles go up as he would be more direct, as per his manager's instructions.
Just because one dribbles more and the other prefers to pass, doesn't mean that comparisons cannot be made. I didn't say they were twins.