GG Mariposa vs. ZPacks Arc Haul

[Minos]

Does the lack of top-lifters on the Mariposa impact the weight carrying ability and the likeliness to get sore shoulders/back?
Top lifter supposedly help carry weight out of the shoulders, so I am surprised that a high capacity backpack such as 60L one would not have them.
Any insights?
Minos

[John M]

Does the lack of top-lifters on the Mariposa impact the weight carrying ability and the likeliness to get sore shoulders/back?
Top lifter supposedly help carry weight out of the shoulders, so I am surprised that a high capacity backpack such as 60L one would not have them.
Any insights?
Minos

My 2016 Mariposa had load lifters. Did they remove them from the newer packs?