I don't have a Howling Fat, but from a design standpoint, I would take the YKLE mainly because I lean more towards having more blade and less choil vs. more choil and less blade.

From a steel standpoint, either one works for me. I really like SR101 and I have been able to put a great edge on my SR101 blades. SR77 is obvisouly tough stuff and has worked well for my uses (mainly camping and hiking).

The choice would boil down to availability to me. Good luck.