On the offensive end?
No, he hasn't shown that at all. He's shown nothing on offense that makes me think he'll be better than Hickson on offense in the future. Some alleged better ball handling that hasn't really helped him much is not some great ability. It might help him get to the basket sometimes, but it's too bad he's not a great finisher at the rim like Hickson is. Robinson spazzes out and rushes it, probably because he's undersized.
Thomas Robinson is the garbage man player in this comparison between the two, not Hickson. Hickson actually has touch and a jumper. Robinson is all effort and crazyness. Will Robinson get better? Hopefully. If he does he then might be as good offensively as Hickson, but I highly, highly doubt he'll be better.
In the end it's my opinion with Robinson being undersized that he won't ever be a great finisher around the rim.