I'd go with the phone that gave you the most pleasing response for content generally. I take it your Sony didn't come with a setup mic/routine to use? Given that the iphone drops all the way to 60 db, and to make it go back to 75, the subwoofer gotta be on house shaking levels, i take the Samsung is probly the better choice, tho, its 80 db felt a bit to anemic personally, and it still gotta go down 5 db, humn, then again, i don't have a good reference point