enough tape on Kozlowski to question even putting him out there at 3 as he lacks the lateral quickness. He was often beat by 4's on film.
He also has a much better post game than Seljaas had coming to BYU (although Seljaas transformed himself post mission).
I agree though there are differences as he is a better shooter than Dalton. Dalton was also better in those areas that you mentioned.
Based on film I expect him to be a stretch 4 when he gets to BYU and hopefully get quick enough where he can play the 3 at some point. I certainly would not expect him start year 1. I think a redshirt year is more likely than that although at this point we simply don't have enough bodies.