For mixing and mastering, you need to hear reverb tails, delays and other FX well.
Reverberation tails are among the lowest-level signals so they are among the most sensitive to the effective noise floor in the room.
In-room reflections whose spectral content is degraded relative to the first-arrival sound may no longer be recognized by the ear as "signal", and in effect become "noise".
The spectral content of reflections can be degraded in two ways: First, they can start out as off-axis energy whose spectral content is somewhat dissimilar from that of the direct sound. Second, encounters with room surfaces can alter their spectral content, usually by removing or reducing short-wavelength (high frequency) energy, such that what remains has insufficient overtone energy for it to be correctly identified by the ear/brain system as "signal" (in this case a reflection), so it effectively becomes "noise".
So imo what should work well is a speaker whose off-axis energy has a spectral balance which tracks that of its direct sound exceptionally well, combined with room acoustics which result in fairly uniform decay times across the spectrum.
Assuming those criteria are met, I would expect a good wide-pattern speaker to be more revealing of reverberation tails than a good narrow-pattern speaker, largely because the wide-pattern speaker is putting more energy into the in-room reflections - which are the carriers for the reverberation tails - which therefore will take a bit longer to decay into inaudibility.
I would expect the JBL M2 and Dutch & Dutch 8c to do a good job in this area.
Edit:
@YSC posted that the ATC's have elevated mids, and suggested boosting the 500 Hz to 5 kHz region to improve the audibility of reverberation. This makes sense to me, as this is the region of the overtones which the ear/brain system looks at to correctly identify reflections as such. (Actually I'd probably modify that slightly and suggest boosting 700 Hz to 7 kHz, this based on the writings of psychoacoustician David Griesinger.)