Grif has far more upside IMHO, Vickery has had his chances and failed in the past, He was OK against Collingwood but still a passenger, more consistency in effort and I am happy to change my opinion.
We have been waiting for TV to become 'the man' for 5 years now, but it has not happened to date. With his size and attributes and a huge change in attitude he could take the game by the scruff of the neck and be a powerhouse instead of a AA