Sir_Catherine
Now I've a similar question as to the Ember the Fox type kin. Which of those is best? Is the original Ember a tree killer even if it isn't the best of the Fox kin? Not sure if I can truly afford Ember, but I do like the look of it.
Considering there are now so many Fox variations (and they all have different stats, skills, etc.) your questions really deserve a more thorough answer than I can give with my current level of exhaustion. For now, I'll direct you to a post that will hopefully help with this decision.
Low Level Tree-killers
This one might be helpful too
High Level Tree-killers
Also, I hope you will be able to get your cutie griffin soon!