Swan's stuff is more in the style of classic illustrators...more polished, more delicate, more pleasing to the eye.
I love, always have loved and probably always will love Swan's Superman. I grew up on it, and quickly learned to spot which inkers had been on his pencils. My favourites were Bob Oksner and Tex Blaisdell, and Francisco Chiaramonte grew on me too. There was, as you say, something very delicate about Swan's rendition: he was just as comfortable depicting rather laid-back scenes showing Clark Kent at work, chatting to people, as he was with the action scenes.
I have the opposite view: with all due respect to Jerry and Joe, the vision of Superman that won over most of the world is one fashioned by Bob Maxwell, Whit Ellsworth, Mort Weisinger, Curt Swan, Wayne Boring, George Reeves, Ed Hamilton, Otto Binder, Christopher Reeve, et al.
Yep. Superman is very much a horse designed by a committee, though the original premise is of course still Siegel and Shuster, and remains unchanged.
Superman is like any character that has been appropriated so widely: there is a sort of shared notion of who he is that is completely different from what the purist might think. It's like Sherlock Holmes and his deerstalker: in the Conan Doyle stories, he only wore it in the countryside (no Victorian gentleman would walk around London in that getup), but film, TV and other adaptations have changed that perception.
I think comics historians have a hard time accepting that anything worthwhile can be created by committee
Oh! You already used the word "committee". I thought I was being all smart and original. Well, I agree with you -- while I have a lot of fondness for Siegel and Shuster's Superman, I really prefer the later stuff. (Well, apart from all the frantic John Byrne Stalinist Revisionism, to be honest.)