Honestly, easily Westhoff.
Tippet has had one decent season, and lots of really mediocre ones. You can't really ever count on him to stand up, and frequently goes missing for entire games. Got decent hands on him, and only a good if somewhat unreliable kick. Doesn't do enough for me.
Westhoff has performed well, particularly last year as a mobile tall who contributes around the ground and up forward. He'll be the better player by a country mile when it's all said and done. He's a natural footballer, and will fill out nicely and with a better tank he'll start to impose imo.
Adelaide fans, it's not an argument to just say the comparison is ridiculous - it's not. At least have something to say to back it up.
Would have the Hoff at the pies anyday. He'd be a nice replacement for Leigh Brown when he's done.