[Rover]

Uh, what else can we compare if the rest is something completely subjective, or even defying definition? I for one couldn't care less about many of those things like these minuscule differences in rendering, so long as a lens provides me with sharp results and behaves well with regard to AF, unless it would exhibit something that really sticks out in a negative way (for instance, my Sigma 14mm is atrociously prone to flare, which makes it hard to use in many situations, but I'm willing to look past that for the uniquely wide view it provides, and don't have the money / the inclination to sell it for peanuts and buy something else instead).

Oh and back to that Pentax... WTF is the deal with the built-in hood???