Crowder is the obvious comp, although he's got a little more explosiveness and length than Jae. If he comes close to Crowder he'll be a steal in the 2nd round.
Theis I see as very different from Crowder, Semi, and Yabusele as he's not nearly as powerful as those 3, but is longer and a better athlete. Good to have versatility. It's hard to see more than 2 of our 3 TE's making the roster.