but the rinnegan is shown too be much more destructive..each of the body it control have a unique ability that blows ur mind..and that's not even the real body of the rinnegan user..if the puppet can do that kinda thing..who knows what the real one can do..
Those moves probably belong to the individual bodies and not the Rinnengan itself. I don't think Pein has all those abilities inside his own body and hands them out like candy. I believe those abilities belonged to the respective shinobi whose body Pein controls.
I still think Sharingan is better, Rinnegan has been shown to basically have complete chakra mastery, and every single element, and the ability to distribute chakra throughout those rods.
Considering the fact that only Pain can use it and it required all six bodies to use, and the fact that every other combat jutsu he has used was a Rinnegan jutsu, I would say it is safe to say it is a Rinnegan jutsu.
Because his chakra is distributed throughout the bodies, and the Jutsu requires alot of chakra, which is why he took the chakra out of all his bodies and put it into one.
Orochimaru uses Kinjutsus all the time, he didn't need any kekkei genkai.
I should be asking you that, where's the evidence that it was a Rinnegan eye jutsu, and not just one of Pains Kinjutsus?
Well for one, Orochimaru is notable for his use of Kinjutsu... we've never seen Pein have any such renown.
Everyone who has seen Pein has noticed one exceptional thing about him that gives him his power... it wasn't his powerful Kinjutsu, no it was that he possessed the Rinnegan. We don't know him to use Kinjutsu, but we DO know him to use the Rinnegan, so it is far more likely that it was a Rinnegan technique. It's like asking how we know Haku's ice is a Kekkai Genkai and not a Ninjutsu.