It's not the same scenario though lol, GSP is a stylistic nightmare for Nate, Mcgregor wasn't. The only reason it's a big deal is because Conor is a star. Nate took it on short notice but his last 2 fights were against southpaws and his last fight before Conor was a southpaw boxer that is the same size as Mcgregor.
When I say same scenario ... I mean everyone is expecting Nate Diaz to lose vs. GSP just like everyone thought Nate would lose vs. Conor. You can say Conor wasnt a stylistic nightmare for Nate Diaz all you want but the fact remains that very little of the fan base gave Nate Diaz any chance to beat Conor. He was a big underdog going into that fight and he will be an even bigger one vs. GSP.