Regardless, you're not getting into the Gee/Butler class even if you do make a relatively arbitrary separation like that.
Wade, Kobe, Harden, Joe Johnson, DeRozan, Mayo, Crawford, Klay Thompson, J.R. Smith, Redick, Afflalo, Kevin Martin, Beal, Gordon, Terry, Tony Allen, Ray Allen, Dudley
That's 18 SG's off the top of my head who are clearly better than either guy. I'm sure there are more.
LeBron, Durant, Melo, Pierce, George, Gay, Josh Smith, Deng, Batum, Galinari, Igoudala, Turner, Parsons, Marion, Metta, Dunleavy, Beasley, Brewer, Tayshaun
There's 19 SF's. I'm probably forgetting some of them as well.
But yes, the 15th best point guard is better than the 15th best SG or SF if you're going to make that separation. If you lump wings together, as you should, they're not even close.
In respect to Kyrie vs. PG, I also don't understand at all why it matters what position they play in regards to their ability to get their team to a title. Yes, historically, there have been more wings and bigs win titles as a teams best player than point guards. Because there have been more of them that are the best players in the league. The amount of point guards who could be considered a top 3 player at any point in their career is miniscule compared to the amount of wings and bigs who could be considered at that level. If Kyrie is good enough to get into the conversation as a top-3 type player, he's good enough to be the best player on a title winning team. The same applies to PG. The position they play is irrelevant.
So basically, Kyrie doesn't need a Duncan. He needs a Parker and a Ginobli. Kyrie can be the Duncan.
Of course, they have the misfortune of playing at the same time as LeBron and KD so both guys probably won't ever be top-3 players at the same time.