Yep, and maybe the dyno says you gained 2hp on top end.
Different height or designed stacks can be beneficial(small gains) on some bikes, but Gen2's only seem to gain anything at peak, so for a non drag racer, they aren't that big of a deal.
Maybe, maybe you find someone that has a specific design and staggered heights that can make a small gain somewhere, but the Gen1 and Gen3 seem to like them changed more than the Gen2 does, which of course points to the camshafts and what they like best.