This has been said in different ways before, but comparing these rifles is like comparing a Cadillac (XCR), to a BMW (SL8), to an Audi (Swiss Arms)...
While they are all nice to own, the flash and accessibility of the Caddy is slightly undermined by the nature of its domestic engineering and lineage. The BMW and Audi enjoy the benefit of implied and realized superiority in Euro-snobbery and Eastern-European engineering.
Or maybe they are more like a blond, redhead and a brunette, none of which would be kicked-out of my bed, singly or all-together...