Six Moon Designs in the US has different packs and harnessing options (Straps vs vest closure), but unless you're willing to order it and try it, I can't say if you'll like it better. I ended up with a 5/11 Tactical light pack because I liked its fit and features better. I found the REI Gregory pack I first ordered cut into my shoulders, so returned it.
Honestly, if you all really need to reduce weight , you'll probably be better off carrying less in a pack that already works for you. I ended up leaving behind a variety of backup gear and toiletries on the Primitivo last year, because it was too heavy or because I ended up not needing it. Unfortunately, I'd already trashed my body by that point.
The only backup items I might have needed, and did carry all the way, were prescription meds and a second set of prescription glasses. Solid soap pieces were lighter even than airline liquid shampoo. Silk sleep sack vs quilt/bag ( I traveled in September). Light packable puffer vs heavy fleece. Zip off quick dry pants. You get the idea.