Unless Looney has previously worked with the new oline coach, which would have been a while ago if it ever happened, he has no more experience with the new system than Biadasz.
Looney does have more experience with different oline systems. That's an advantage.
But for his injuries, and some poor tape last year coming off injury, Biadasz was probably a second round pick. I went back 5 years on Rimington Award winners. I think all started their first year.
Wisconsin oline is simply a factory for NFL ready olinemen. Biadasz was the Rimington Award winner. And Biadasz actually started last year, while Looney rode a bench.
If the draft drop was wrong, and Biadasz isn't physically limited by injuries, he'd be considered a plug and play day one C. Sure, he'll have plenty to learn. Playing him speeds up that learning.