What I meant by this is what SS explained in a far more LOQUACIOUS manor. You can use different weight buffers with both types. There is more combinations ( to mess up too) with the carbine system. I would reference Clint's chart, from heavy buffers.com. When building I only use his parts, heavy buffers, to reduce felt recoil. Another method is using an adjustable gas block and tuning that way.
K.I.S.S is a recipe to success. FYI