Bobby Clark, was IMO better than both because he had to work with worse defenders in front of him for most of his career. also he held the shut-out record for years!
Remember he came from the days before real fitness training yet was probably the fittest player we had.
OK, not as spectacular but he did win us the league in 1980, the cup in 1970 and the league cup in 1976 (with a broken finger)
Was my first Dons hero (age, I know).
Theo and Bandy though, nae bad comparisons!