1)Requires knowing what the total board power draw - not the TDP, they are different - is for both, as well as someone having tested 'em on an open test bench using custom fan curves; their coolers function differently too, so the moment they are put inside a standard case, things change favorably for one model, and negatively for the other.
2)You're going to tune the fans on either model to your comfort zone, and use distance from PC varies, ~so... impossible to say unless you test them side by side.
3)... yes.