Well, engineering certainly did look different. I didn't see anything that looked remotely like a warp core, did any of you?
Those canisters they ejected to escape the black hole... did Scotty say he was going to eject the "cores" (plural)? They looked like matter and antimatter containers to me.
Well, in any case, it looks like the basic design of starships in this new Trek universe is substantially different than what we've seen before.