What's that with, Russ?
I seldom get anything that crisp - more a sort of plastic look. In fact, it's the same difference I used to get with the 3.5/75mm Tessar on my cheap Rollei TLR when compared with the 2.8/80mm Sonnar on the 500 Series. A kind of softer-but-still-crisp look graced the Tessar against the very sharp Planar.
Mysteries of life.
Rob