Kaladin is almost certainly different from everyone else, including Radiants. I think it's pretty obvious to assume this from all of the above evidence, and more, especially considering he was the first main character introduced in Stormlight, Brandon's magnum opus.
Nearly every single prediction I made for RoW was completely wrong, except for Kaladin swearing the 4th Ideal, which everyone saw coming, so I don't trust myself to see what's coming anymore. I could get behind the idea that Kaladin is somehow directly related to Tanavast. The problem with that theory is that in order for Kaladin to be related to him, there would certainly have to be others. This seems like a weak theory to me.
I'm very curious to know what happened with the red/yellow eyes thing. "
“His eyes were glowing like a Radiant’s, his face a mask of pain and anguish, but the eyes … she swore the light had a yellowish-red cast to it. Like … like …”
I'm starting to think that during that brief moment of rage and pain, Kaladin had given himself to Odium, similar to Moash.
Honestly, I have no idea what is going on with Kaladin.