There is more colouration of the tone through a G12K-100 than an EVM 12L. Not in a bad way, I might add - the cleans are warm and smooth - still a good clear top end, though, but the mids are beautifully balanced, IMHO.
I'm not sure if you'll be able to handle the awesomeness of either speaker, given that you obviously own a telecaster ;) hehe
When you push these with a loud clean signal (or as clean as you can manage with a 5150-II - LOL), they do have wonderful fatness - fatter than the EVM12Ls, I'd say. That's part of the reason I think the pairing works so well, and why it would work just as well with Hot-100s, too. I had some Hot-100s in a Randall combo I had, but the amp itself was pretty poor, so I wouldn't like to comment on the speakers too specifically. I was impressed with them, though, I remember that!
It's tough, because you can't simply buy them all to test which speakers/combination of speakers works best for you. Well, you could, but you'd lose out on the resale value of the speakers you don't end up using!
I know it doesn't necessarily help you make up your mind, but I'd say you'd probably be very very happy with any of the speakers we've been discussing in this thread (Delta 12s, EVMs, G12K or Hot-100s). I'd personally lean towards the EVMs for the power handling, considering you're after a completely clean tone with a lot of headroom. Two of these will take pretty much any signal any guitar am can throw at them, without blinking!!
Good luck!
Roo