Board Thread:Breeding Questions/@comment-24226549-20131128190019

I was wondering if breeding a Volcano Dragon with a Platinum Dragon instead of a would yield the same results with the same possibility as using a Flaming Rock Dragon to mate with a Platinum Dragon. I do understand they are both composed of the exact same elements, but some attribute called "Category" on their Wiki pages differed from each other, causing some confusion. Flaming Rock had a Category of 2 in Terra whilst Volcano had a Category of 3 in Fire. What is "Category", and does it have any effect on breeding?

Flaming Rock Dragon Wiki Page 

Volcano Dragon Wiki Page  