They're both good but Gundogan seems more well rounded.
I actually think Gundogan is a better defender, Kroos honestly seems like a CAM while Gundogan seems more like a CM.Gündogan more well rounded? He's really good but he's lacking in defense I think, Kroos is better defensively imo! Offensively I think they are pretty even, both are equal in passing, Kroos better at shooting and Gündogan is faster. But I would pick Kroos over Gündogan.
I actually think Gundogan is a better defender, Kroos honestly seems like a CAM while Gundogan seems more like a CM.
Luke Shaw or Danny Rose? (Potential)