Ooh good question. I've never used either of those lenses, so I can't compare. I've liked just about every 50 I've owned, so maybe I'm too nice about lenses. But I really like the Super Tak--it has great bokeh, is really sharp at all apertures from f/2 on, and has a vintage "glow" at 1.4.
Originally Posted by GarageBoy
I don't know how good it is, except to say that I like it better than the Pentax-M 50/1.4/1.7/2
Stopped down, prolly f/8 (and be there):