I have zero experience with Kifaru. Years of experience with EB's. Well built.....overly built! They are heavy. Good designs but could use a better waist belt cinch pattern. You have to pull back to tighten the waist belt. Your muscles are weaker when pulling back. I have a new Kuiu Pro 3600 back pack. Ran it a bunch this year and it's performace was spectacular. It's "pounds" lighter than an EB of equal volume. The waist belt tightens by pulling forward which is designed for the way your muscles want to push. Much easier and better. Packing out elk quarters was much easier than with any EB i've ever used and i've used 1/2 dozen different models. Well, thought out adjustments for the suspension system to fit. Kuiu's "kits" allow one to pick and choose different packs, suspension and frames.