You know when you have a mate over and have to move over on the couch to give them the sweet spot. Well when I replaced my ss integrated amp ($2.4K being used as a pre into a power) with my new tube pre ($2.3K) I experienced one of my most palpable moments in audio listening - the soundstage did not collapse one iota. Everything was still spot on except for an uneven balance. My speakers are standmounts that are carefully setup re: measurements from the listening position.
My simple conclusion is the new pre is better than the old (and so it should be).