I'm told the header is Stainless and will make several more HP than stock. the merged area of the collector is similar to V&H.
IMO much of the "Common Knowledge" surrounding this topic is mostly "Urban legend"
I have seen various claims about stage 1 upgrades ( High Flow intake, Less restricted Exhaust and a remap of the ECU)
AT most an 8hp gain of all these combined is huge! Many pipes and mods actually reduce HP and fuel mileage.
I wouldn't put a lot of stock in "vendor claims" or "Common Knowledge" Call me a skeptic.
(Hell I don't think if the FED keeps printing money its value will increase!! but I digress)
Changing the exhaust expecting more than mellow sound is probably a slight reach. If you want performance its a proven conclusion you need to go with a 2 into 1 system.
Most of us prefer the esthetic's of the 2 - 2 system with the least performance coming from a "True Duals" system.
So throw performance away for the most part and it all comes down to what you find appealing?
Personal preference.
Yes you want to eliminate the cat and the lean conditions that it ships with after that if your not changing Cams, Porting heads and making major Mods it truly isn't going to make a difference except to the Dyno and its not going to ride your bike?
So pick the one you think sounds sweetest that doesn't adversely affect performance and wallah
"It's all good"