I'm leaning towards to the caramel - based on the photo of the ultramel next to a caramel. I don't know whether I'm getting one myself some day but I wouldn't doubt it. The caramel glow rocks!

The colors on an ultramel almost gets too 'melty' compared to a caramel. Especially on that photo with two of them only showing some of their back.

Just because some of the offspring gets a 'huge back'/'kink' then it does not mean that every single animal gets it. It's the same thing when pairing two pieds together. Just because you have two high-white parrents then it does not mean that all of the offspring is going to be high-white or even coconuts.

I'm almost certain that ultramels won't blow caramels away. They are two different animals (colors) - both looks nice and I would be glad to own one of these beautys.