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When comparing headers I did so with no tuner. And with tuner. Jba was the clear winner.
A tuner makes only a little difference when naturally aspirated as far as numbers. While it does in fact change driveability pretty dramatically.
You did it like a true scientist. I live in CA, where you need a visual test, and I have been all pondering all possible options.
2015 SR5, Crew Max, 4x4, 5.7, 4.30's, factory spray-in liner, white w/black interior, Hellwig rear bar, Hypertech, Bilstein 5100’s, middle setting.