Radice is correct. Sasuke's one tomoe Rinnegan possesses the power of two regular. I'm pretty sure there's not even sufficient proof that you can use the Six Paths techniques with only one Rinnegan, which further proves the former theory of Sasuke's being special. Of course you'll never believe that because Kishimoto though the audience would be able to figure that out without a guiding hand.
No, his reasoning behind that fallacious belief is, that Madara needed which no proof that he actually did. As matter of fact, Madara with one eye never intended to use CT during that time; he had no intention to. False...Obito stated he could use all the 6 Paths techniques with only one.
1). He self-claimed he can use Human Path on Yamato - there is one proof Six Paths technique can be used with one Rinnegan.
2). He used a superior Outer Path with only one Rinnegan - there is the other one.
3). Madara taught him to use all Six Paths techniques; and holding this knowledge with the Doujutsu itself, then he can.
4). Databook lists him as user of Animal Path - another technique of Six Paths.
The only thing special about Sasuke's Rinnegan is, it has Yin dominance over the standard Rinnegan, which makes sense because his Rinnegan is created by the Yin materials of Hagoromo's Yin Chakra. That's evident by the 6 tomoe he has. The normal Sharingan carries 3 tomoe, and Sharingan is a Yin power, so having an extra boost of Yin would naturally increase the number of tomoe.
Madara needs two rinnegan to use Chibaku Tensei
No proof that he
needed. Chibaku Tensei was nothing more than diversion for Madara to fly and activate IT, while Naruto & Sasuke are busy cutting his CT.
Sasuke made chibaku tensei with one.
Anyone with Rinnegan can make CT.
When Madara was a edo Tensei his rinnegan is a fake one.
Sasuke's rinnegan is true
My point was never about Edo Tensei.