Ones got a ali barrel and the other a carbon barrel with steel rings on the inside

Seriously though, I find the ali barrel a bit heavier than the carbon and prefer the added bit of weight in the barrel, I havent shot the carbon model but I do like the balance of the ali. More weight also means less recoil. Also Im kinda old school so I prefered the ali for this aswell.
Hope that helps
__________________
Dive safe and shoot straight
- Hénré -
------------------------------------------------------------------------------------------------------
"Thinking is the hardest work there is, which is probably why so few engage in it"
- Henry Ford -