Ok, cuz the blue props are a different animal.
Theoretically the stainless prop, having thinner blades and a little more cup will bite and hold the water better. They'll do the job of pushing the boat better.....but the difference in the tach reading at WOT is anybody's guess.
Propping boats to obtain the best prop for speed, hole shot, hard turns, ect. is a practice heavy in witchcraft. I absolutely despise "prop doctors" that allegedly tune props for various applications. All they are creating is a boat part that can't ever be duplicated. It's horseshit! So who cares if it, by chance, turns out to be perfect. Plus, alot of those "tuned props" throw blades.....and then you're stranded, and back to square one..... provided it doesn't kill you.