There is a small difference diving the smaller wing. I dove my LCD 30 for a couple of years, before getting the TTW 17. The tiny wing vents instantly, which is nice; in tropical water, where you don't need much air in the wing, it gets up in the pontoons of the larger wing and you have to work a little harder to vent. That said, the larger wing is absolutely usable.
If you are going back and forth between warm and cold water, the weight plates are really nice, especially if you are one of those folks who really doesn't like weight belts.
If you are going back and forth between warm and cold water, the weight plates are really nice, especially if you are one of those folks who really doesn't like weight belts.