'Better' because they are more painterly, or better because they look less like a physical object?
Mainly because of the reason I stated before: They retain the grace and lines of the 6ft model yet have the detail of the 4ft model. The superior resolution over the existing footage is a given. Add to that a greater range of shots and motion and you have a superior product for the remastering.
Isn't the grace (such as it is, or isn't) of the big -D due mainly to the fact that it doesn't have the bulbously obvious detail of the 4fter?
And I'm REALLY not getting the resolution issue, since you haven't got a medium that comes remotely close to 35mm resolution for this cg work you speak of.