You apparently push a narrative that makes little sense other than showing that having a dB versus power output calculator to play with is interesting. The extra wattage at this 50 W/ch to 85 W/ch level will make a difference, provide more headroom for transients and allow for the effective use of parametric equalization, variable loudness and bass control. Not everything at this level is explained by a measly tiny little 3db and so thus ignore the extra wattage and so purchase the smaller amp because it is the same price or even more. There are major benefits to having the extra power at this level. I have many times compared Yamaha ToP ArT amps to regular amps and tested them in comparison via a switchbox with 35 W/ch, 40 W/ch, 50 W/ch, 60 W/ch, 80 W/ch and onward up till about 120 W/ch and know what the reality is when operating the amps and how they respond to the various little steps up in power. One can and does sense the increased power output of a 50 W/ch compared to a 85 W/ch amp. It is real, tangible, noticeable and the calculator can fly to the moon in this example because it does not explain the headroom advantage or the ability to PEQ, to apply variable loudness and to use the bass control due to having the larger power output amplifier. Please do the OP a favor and please leave the dB versus power output calculator out of this one because it is not making things better and in fact is making things worse for the OP.