Muzzle dia is important only for thread sizing, for me anyway. You can’t put 5/8-24 threads on a muzzle less than .625” without thread adapters and extra crap. Pick your muzzle device in a given thread pitch based on availability, direct thread suppressor it’s obvious. In my case Q makes adaptors in multiple pitches for the can I already own some are available some back order.
What’s your intended use of the gun?
Will saving a few ounces be worth the extra cost?
On hunting rifles I’m all for carbon fiber, every ounce counts in the hills and the cool factor is undeniable.
Truck, tractor, deer blind gun it’s a toss up you’ll never notice the extra ounce or two.
Folder or fixed stock, in/out of a pack or use only a sling.
Target gun the extra weight is beneficial, but I leave my 12lb long barreled gun at home if I’m walking any distance.
My next rifle will wear a 16” steel m24 contour, folding stock, it’ll be exclusively suppressed and should fit perfectly in my pack.