I use my Horn Hunter Full Curl System for just about everything. All the different configurations you can do with this pack make it adaptable to any hunt.
Ox = Lifetime with Great Customer Service
Full Curl = Lifetime with Great Customer Service
Ox = 4400 cu/in (Feels big on your back IMHO)
Full Curl = 5000 cu/in (Slim design makes it feel compact)
Ox = Felt comfortable to me but definitely feels like a frame pack. (I haven't used it with a heavy load)
Full Curl = Has been a very comfortable pack. Never had a problem with heavy loads, transfers weight to hips perfectly and no shoulder strain at all.
Ox = Great pack for hauling in all your gear to spike camp and great pack for hauling a pile of meat. Not a daypack.
Full Curl = Great for hauling in all your gear to spike camp, remove the duffle bag portion using just daypack/frame for all day trips plus haul as much meat as you dare.
Ox = New about $500
Full Curl = New about $300
This is just my comparison and maybe for your style of hunting the Ox is the way to go. When I compare the two for my type of hunting I go with Horn Hunter all the way.
Field Staff Horn Hunter
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Field Staff Beard Buster
Field Staff Sly Dog
Field Staff Snug Fit