Stone Glacier

Not sure what you are after. I run the x curve frame and have no experience with the krux frame. It all depends on the shape of your back. If you are trying to decide between the two, there is a way to test your back shape. You can stand with your back against the wall. If you are able to put your fist between the wall and your lower back the xcurve might be best. I would always advise you to get both and test the fit and return the one that doesn't fit correctly.
 
I’ve had an xcurve since ~ 2017, it’s been used pretty hard. I tried the crux frame for a bit and I found the xcurve fit me better.

If you have any more specific questions I might be able to help but I havnt played around with that many backpacks. I got the SG to move on from Kifaru and now it’s been like 8 years using that pack. My only other frame is a Barney’s frame which I’ve never raised as a backpack, just a load hauler for moose and bears.
 
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