Originally posted by filorp The 35/2.0 from Canon or Nikon is a cheap plastic lens so it's not surprising to have significant sample variation. 35/2, 50/1.4 and 50/1.8 are classic designs I wouldn't say that one brand is better than the other on measured performance(center, border sharpness, chromatic aberration etc...) But they do have a difference in flavor and build quality, Pentax being on the good side of the average (Zeiss being the best)
Now, the current price for 35/2.0 from Pentax is pure delirium, it's about 10% cheaper than the FA31/1.8 wihich is in a whole different league on every aspect. If you want a faster lens than the DA35/2.8, this is clearly the way to go.