Header size for 6.2

[Crobinson16]

I've searched but haven't came up with a definitive answer. I want to put Long tube headers on my 2011 6.2 but can decide between 1 3/4 vs 1 7/8 I for sure thought there would be someone among tuner world that has dnynoed both for a comparison. I have no plans on putting on a blower. I am currently tuned by Black Bear and pleased. Some of what I have found is that the LS3 / L92 head design benefits more from the 1 7/8 over the 1 3/4 even in stock form with out giving up bottom end tq. Where as the older LS2 is the other way around. Just wanted to see if there were a real world comparison in the truck world.