Don't know about the Cobra T, but I've got a Cobra S in the neck of a Strat. Thenine's right, they're true single coils.
If the Cobra T is close to the rest of the Cobra's, I'd guess it's a modern sounding, medium output pup with a full range and no real obvious peaks in the frequency response. Again, just a guess, but I'm thinking it's somewhere around an EMG, just more organic and bouncy (for lack of a better word). I don't have any EMG Tele experience, but I've had a set of EMG SAs in a Soloist and the Cobra S is like that.
I do have a Flat 50s set in an AVRI Tele and it is, hands down, the best Tele pup I've ever heard. Nothing else even close. I agree with USofguitars that any of the BKPs are going to be an improvement. After that, it's all just a matter of taste.