There is no real definition of match. Usually it means that the specs are on the tight or minimum side. There are also lots of different throat combinations. They may even require neck turning.
Match chambers are nice if you shoot in competition, buy new brass, use bushing dies, and don't mind turning necks.
A regular reamer with a no turn neck can shoot very good in a custom barrel, and will let you use once fired cases, and regular full length dies.
I have a couple of match chambers that will not chamber factory ammo because the necks are too thick. So, you may or may not be able to shoot factory ammo. Also, a regular die will over work the brass fired in a tight match chamber.
You should really be confused now! This has been my experience with several custom barrels, and I hope it helps you, at least a little. Lightman