FDn 24 2.8 vs Sig 30 vs SEL18200

Well, I am on vacation. I figured I'd take these three lenses outside and try to set up similar conditions and take shots at a few different apertures and see what happened.

Using a Canon FDn 24mm 2.8 I just picked up for $75. A Sigma 30mm that's $199 and the SEL18200 that I paid $695 for used. I think I was at 22mm and 28mm with that lens as I couldn't exactly tell. Also it doesn't do 2.8 so its at 4 and 4.5 or so on the wide end. (It does f3.5 at 18mm)

Shot in A mode on a tripod and although the shutter is changing the iso stayed the same, I thought that was more important. They were shot raw and then just uploaded to dpreview with a no greater than 2000k limit placed on the jpgs. Ive never done this before so bare with me. Either way, what do you guys think? I think its kind of weird how bland the colors of the FDn are compared to the other newer lenses. What is better? The over saturation or the grayish tone? Either can be fixed pp but is there a reason for this?

The order in each series goes :
FDn 24mm 2.8
Sigma 30mm
SEL18200 @ 22mm
SEL18200 @ 28mm

At F2.8, 2.8, 4.0, 4.5

At F5.6

At F8