Owned a Bora 95 since 2001 and the denail pro since 2009. Both packs are very big and durable. The denail is better for carying skis and is taller and skinnier in shape. The bora is short and stout. Both are comfortable and cavernous. arcteryx has good customer service (replaced shoulder strap and received extra fabrics). I can fit my stuff in the bora slightly better probably because i've had it longer. The front entry on the gregory is nicer than the side entry on the bora.