Originally Posted by EdSawyer
... Ideally, keep both - they differ enough in angle of view that it is useful to have both of them. ... there's not much overlap in terms of functionality.
Agreed. I have and use both for the RB. They are not interchangeable (IMO). If you prefer one over the other, that's fine, but just basing it on "sharpness" is apples and oranges.
Taking pictures is easy. Making photographs is hard.