Ra-Tech Precision inner barrel 6.01 or 6.03

[Nickaayyy]

Hi guys I have a new noob question for you :P

I found a Custom WE Hk416 (all RA steel parts except NPAS to add). I was curious about the barrel so I've done some research on google. It seems there a huge debate on 6.01 and 6.03 barrel, but didnt found info the RA only the Madbull or the PDI (not sure it's the name).

That's what I found

-6.01 barrel have higher FPS
-6.03 barrel have higher accuracy

So I'm asking advise too you guy's, is those rumours are true and what do you would recommend for a spotter or just field fight?