If you're concerned about accuracy, you should consider a longer barrel. Otherwise, I wouldn't think there'd be a hill of beans difference between the two inside 25yds.
This is great advice. 12" minimum if you are concerned about accuracy. 1-12" twist is great for bullets heavier than 40gr. 1-16" will not stabilize the 60gr Aguila loads. The accuracy between an Apogee Match in any length that is available (12"/16"/21") is going to be much much better than a 4.5" barrel.
I have a used but like new 4.5 CMMG that I would sell you pretty cheap. I replaced it with a 16” pencil barrel. It is pretty accurate inside of 25yds with a red dot.