How would GSP versus Silva have gone down?

To make it interesting, let's say that we take a prime version of both of them. In my mind, that would be the version of Silva that beat Rich Franklin versus the GSP that beat Fitch. Who would have taken it?

 

But could he have survived Silva's guard when he did get the top position? Silva had an extremely dangerous offensive guard that was well suited for mma purposes; he made excellent use of elbows from his back to slice opponent's up, and upkicks when they tried to posture up. And he was always looking for submissions off his back (triangles, armbars, kimuras).

I know Silva struggled desperately against Chael in their first fight and GSP had much better submission defense and positional control than Chael did, but Chael is also a much bigger man than GSP is. Silva ultimately got those triangle chokes against Lutter and Chael, even though they posed a real danger to him beforehand. And we have at least one example, in the Bisping fight, where GSP did get sliced up pretty badly by elbows when he was ontop. Granted, that was an older, very sick and extremely rusty GSP, but it is worth mentioning.

I agree that GSP would be able to largely control the range and the flow of the fight with his near perfect mixing of striking and grappling. But if he could control top position and avoid threats from Silva's guard while doing some good work from the top, could he maintain that for five rounds against the much bigger man? Could he have avoided Silva's sniper like strikes, like an unexpected elbow or high kick that came out of nowhere, during the stretches where they fight did end up back on the feet?

Chael was doing good excellent and then out of nowhere Silva caught him with a stepping in elbow and started slicing him up from his back. The exhaustion of fending off constantly threats and damage from Silva on the feet and his back eventually took their toll on Chael and he lapsed in concentration because of it even though he was dominating the fight.

Would GSP have been able to be perfect for the entire fight?