Shaw has more quality with the ball at his feet but hes not proving to be a better player because too often hes caught on his heels, or jogging back, or positionally loose.
Its a bit like the Pogba argument from a lot of posters who see talent and equate that to being a good player. But theres so much more than that - being on your toes, mentally focused, positional awareness, aggressively defending, communication etc.
As I see it, Shaw is just better with the ball at his feet and crossing. Thats about it.
That applies to when Shaw is not playing well, not when he is.