Can't get too hung up on lens resolution. How often are you going to have a stationary target in full illumination and a tripod? Rarely, if you shoot like I do. Things like lens speed, focus, durability, focal length...these all directly impact your ability to get shots. Resolution is undoubtedly nice, but beyond a threshold, it's only good for pixel peeping. And with all the lenses discussed in this thread, we're beyond that threshold
That Zeiss is a nice lens, good find. I often shoot a Pentax Limited 35mm f/2.8, which probably shares some DNA with the Tokina 35. They're all great lenses. 35mm is handy focal length on a cropped sensor.
Regarding manual focusing...I find that with many things (fast moving children, sports, animals, adults) I am actually better able to frame a shot and get sharply focused subjects through the depth of field when I focus manually. It takes some practice, sure. But once you get the hang of focusing manually with a nice well-damped lens, I bet you will find the same! A human can predict what will be in focus to make the shot, while autofocus mechanisms are always reactive.
True they are all great lenses as far as resolution. I do find some perceptible differences in color, however, especially among brands, which I guess depends partly on the lens coating used. Anyway, UPS should be delivering the Zeiss today (fingers crossed), but now I'm finding out I will *need*(?) a focusing screen such as Katzeye, which unfortunately runs $155 with Optibrite. I don't particularly want to open my the camera and do the operations, presumably voiding warranty, so I'll try to get away with live view shots and the LCD magnification for critical focusing..