tuga
Major Contributor
Your first job should be to get a speaker that has good on and off-axis response. If two speakers are identical in that regard, then there can be some room for preference. If the two speakers don't have these characteristics, their dispersion effect is not dominant in preference.
In my experience/preference a flat on-axis speaker with a smooth yet not completely flat off-axis horizontal response (small amount of beaming at the top of the mid-woofer's passband in the presence region) works better in a small domestic room than a speaker that's also flat off-axis such as a pair of T2s I once owned.

And what about driver resonances? If they are high enough to show up in frequency response, then it matters. If they do not, then they are technical curiosity, not a factor in preference.
How do you measure a resonance in a room?
Do you just plot a frequency response curve or do you look at the decay?
Which one will provide more information?
A small say 1 dB ripple may look inoffensive in the on- and off-axis frequency response plots whilst a CSD plot might show that same ripple causing a high-level, high-Q resonance that keeps on ringing after the rest of the spectrum has gone silent.