Generally I think what you'll find is that the newer morphs will tend to be a less 'stable' animal. This is probably because breeders will be more likely to breed a less healthy new morph than a less healthy older one, because they need the genes. However, as the morph grows in number and popularity, the breeders can then focus on creating a more solid stock rather than reproducing as many as possible.
Another factor could be that the genes that cause the color mutations could also account for a minor complication. After all, the different morphs are mutations, and most wouldn't be able to survive in the wild. The color mutation is what's seen and what many hope is the only mutation, but the reality is that it is very possible that not feeding was genetically connected to the original bloodred coloration.
Other factors may include enviornmental and chemical reactions amoung color mutations. This could be like how people with more melanin in the skin tan easily and rarely burn. Take away most of the melanin, like in the classic caucassian (sp?), and they get sunburn more easily.
Anyways, I could go on further, but a post can only be so long without boring people and being completely wrong on some points.
The truth is that while some differences might be obverserved amoung different morphs, it really is hard to make a generalization like that. Granted, if you have a grumpy blizzard, you might be able to account it to it's morph, it isn't nearly always the case.
Hope this helps, and please correct me if I'm wrong on any of this.