Thanos vs Silver Surfer with a twist

If the Silver Surfer and Thanos had switched bodies including their individual powers who would win? This is Thanos from Annhiliation and Silver Surfer from Annhiliation.

I hate to say this, but the established relationship between Surfer and Thanos is such that, virtually no matter what, Surfer will lose. Period. It's as if the very character of Thanos was designed specifically to turn Surfer into a punching bag.

In this instance, all switching bodies/powers will do is make it look like Surfer finally got the upper hand.

Imagine Thanos genius with Silver Surfer's powers

Silver Surfer somehow always forgets he has the speed to just fly away from where Thanos can reach him then snipe till he dies.

In the case of a swap, I don't think Thanos will make that mistake but it will take a looooooong time to down SS in Thanos body.