What’s missing in watts is the output impedance of the amplifiers. This can behave in positive or negative ways depending on the speaker and it’s design.
Also, its important to understand how little watts have to do with loudness. Relatively. Doubling the power increases loudness only by 3 db. To get double the loudness, you need 10x the power. So the difference between 90 watts and 150 watts is less than 3 dB.
If you want to do the math yourself:
change in dB = 10 x log ( powerA / powerB )
Best,
E
Also, its important to understand how little watts have to do with loudness. Relatively. Doubling the power increases loudness only by 3 db. To get double the loudness, you need 10x the power. So the difference between 90 watts and 150 watts is less than 3 dB.
If you want to do the math yourself:
change in dB = 10 x log ( powerA / powerB )
Best,
E