Stupid speaker test question...please help a n00b

Ears are less sensitive to distortion at lower frequencies. 5%? 10% I know it would look awful on a chart.
At higher frequencies ears are much better.

As for sensitivity being the sole measure needed? Well, I'd like to know if I were getting a speaker with high phase angles before popping for that good tube amp.
The dyns and va should be compared in optimum setups in the same room.
It is easy to have that much variation so that the speaker with better bass spec actually sounds thinner. Maybe the speaker is built to a higher 'Q' or there is an amp issue with speaker / amp not getting along at low frequencies where a high phase angle may play havoc with an amps ability to produce enough power. All sorts of other possibliities exist.

Now, I dont' know....how easy IS it to measure speaker distorion and how many flavors does it come in? Is time / phase coherence part of distortion?
Doing such measurements sounds like a legitmate use of an anachoic chamber and mega bucks worth of amp.

One limiting issue in hifi is measurement vs perception.
Apparently, everything that can be measured doesn't matter and some things which matter are not measured...or perhaps measurable (yet). Add in literally hundreds of tweaks ranging from Schumann frequency generators to having a Seance before listening doesn't help much, either.

Toss in a good mix of those in favor of DBT, SBT and whathaveyou and you've got a real mess.

Contentions that 'amplifiers run in there linear, non-clipping area all sound alike' without reference to what speaker is being driven, don't necessarily help.

'Ya can't take it TOO seriously because 'that way lies madness'.

Some of what would seem to be basic advice like....listen before buying or find a good sales guy to trust and work with.....may not help because a person new to this 'hobby' doesn't necessarily know who to listen TO or what to listen FOR.

Advanced HIFI does a poor job of selling itself, but that's another thread.