Both have issues and both have decent replacements. If you like Spiders, chances are you like cool patterns so you might like the Pin. If you like Caramels, you have a good substitute without all the kinking issues in the Ultramel. I do not care one way or the other what you keep, could honestly care less, but train wrecks suck. I was just pointing out an option to keep others from the heartache of expensive train wrecks. Keep making your Bumble Bees, Spider x Pastel, what an inventive combo...I am not trying to steer you away if you LOVE spiders, just if you are on the fence about what to get....the Spider might not be the best choice if you are breeding Balls.
Dave