So, using a Kifaru will result in a bigger bull????
This. All three are good brands. Try them out. Load them up with a heavier sandbag, hit a local hill for a couple of hikes, and you’ll know how they feel under load for your specific body. Keep the one that fits you the best, turn around and sell the other two on this site for a nominal loss. Benefit is that you will have removed doubt and found the ONE that fits YOU best. Good luck!Buy one of each and try them out. A pack that feels great for one person might not feel good for you.. all are great packs and all have their pros and cons.