As far as barrels go, more accurate, no. Stainless will machine better(in the bore) and most companies will automaticly lapp stainless barrels to remove tool marks. Most charge extra for lapping chrome moly(blued) barrels. In the end stainless usually dont foul as quick and clean easier than blued. Some people clame stainless bores will last longer but I cant say its true or not, I only have one chrome moly barrel and it has not been shot enough to wear out.

Steve