Loudspeaker sensitivity and dynamics: are the two inexorably linked?

Think of thermal compression at 1 watt at 84db vs. 1 watt at 99db!! 
I’ve heard the difference hundreds of times…… the 84db (low sensitivity) sounds stuffy and congested with no dynamics. Doesn’t really matter what topology 

When you figure out the difference in the cross section of voice coil wire and inductor wire in crossovers you get back to us. 

I did the work for you on resistors. 50-100ppm for good ones. 200-400ppm for cheap. 25C on the cheapest resistors is 1%. Maybe it makes a 1/2 percent difference in the circuit?   I doubt even the most expensive speakers are built to that tolerance and they won't use cheap parts.

A lot of people making up stuff to suit what they want to believe here. 

Paul Klipsch gets quoted for saying he just wished somebody would make a quality 5 watt amplifier, (hopefully I didn’t butcher that quote too bad) I’m not sure how the math works, but I would think the difference in sensitivity can be evened out by using more powerful amps to compensate. Say, a pair of kilowatt amps for 86 db speakers could have the same dynamics as a horn design being driven by your favorite 12 watt tube amp?  Having no educated qualification I would think heat would have to be addressed when designing for maximum spl? 

Having read the thread and at many points being out of my depth some questions remain that interest me. Small sample size here as to experience so bear with me. Recently changed speakers going from Zu Def 4s to my present speaker. The Zus being a really high eff speaker probably used just a fraction of the available power and could honestly project a tremendous sound pressure, hit you in the chest type of stuff. My electronics are pretty high end tube chain, so no  brightness, actually a very nice timbre and tone.

The 10" drivers, even when pushed hardly move. Dynamics in spades. New speakers, while the have better resolution and I guess you could say better resolutiont don't have the immediacy or frankly the presence of the Zus. They are rated at 93db so probably not stressing the amps, which are rated at 100 amps.

Just assumed it was efficiency related but after reading the thread think maybe it's some other factor.

Having read the thread and at many points being out of my depth some questions remain that interest me. Small sample size here as to experience so bear with me. Recently changed speakers going from Zu Def 4s to my present speaker. The Zus being a really high eff speaker probably used just a fraction of the available power and could honestly project a tremendous sound pressure, hit you in the chest type of stuff. My electronics are pretty high end tube chain, so no  brightness, actually a very nice timbre and tone.

The 10" drivers, even when pushed hardly move. Dynamics in spades. New speakers, while they have better resolution don't have the immediacy or frankly the presence of the Zus. They are rated at 93db so probably not stressing the amps, which are rated at 100 amps.

Just assumed it was efficiency related but after reading the thread think maybe it's some other factor.