Actually neither of those.
I prefer AA, or other target loads, and the one ounce loadings in low brass (game loads are 7/8 ounce) - talking 20 gauge here.
The AA or other brands of target loads have better quality shot than the game loads and tend to pattern better.
The one ounce loadings in low brass contain the same amount of shot as the high brass loads, but are a bit easier on the gun and the shoulder, and as a general rule will probably pattern a bit better than the high brass loads (but that will vary from gun to gun).