Match 3 Results are Up. Wooooo
I'm not 100% sure I agree with your assessment.
When it comes down to 4 losses versus 0.4 ttw, its is more of a draw if anything. Honestly, with a 0.4 ttw difference I would give it the fire rush personally as you will win faster and hence more efficient most of the time.
At the end of the day, these are the two fastest deck types in the game.
I noted down the wins that Shrieker Rush had Vs decks with creature control. Which the Fire Rush lost to. If I make 4 of those wins into losses... the turns per win score drops down to 6.167 for the Shrieker Rush. Now you have a .24 TTW difference.
Also, TTW, does not totally represent play speed, as is discussed many times in your TTW study. The shrieker rush is one of the fastest decks to play, since you don't have to think, you don't have to cremate creatures, or buff them every turn.... so there are other considerations, if you want to add to the stats already there.
But to me, in this comparison, I am going mainly by win percentage, and how strong a deck is. Fire Rush was losing to decks which Shrieker was winning against.
Yet, if what you care most about is TTW, then Fire Rush is best. You just have to quit out of unfavorable matchups.
It is very true that they were very close in performance... as it is, I didn't think the current champion deck should be dethroned, when it came up with a better win percentage, and a pretty close TTW score.