Have you listened to this podcast, has a lot of valuable insight for them both.
When it comes to folding rifle chassis that are purpose-built for the weight-conscious backpack hunter, there are two primary options — The XLR Element 4.0 and the MDT HNT26. In this podcast, Mark shares his personal experience with both of these chassis and makes ten comparisons to help you...
exomtngear.com
I have no experience with either, but I love having a folder in the field (308 Sig Cross) and I am considering swapping my 300 for chassis/folder based setup. For me it is the extra suppressor length while having it strapped to the pack that has me shifting directions. The cold hands, even with gloves, is a thing on the aluminum hand guard. Have always had a great experience with the folks at MDT, no experience either way with XLR