I'm very new to both types. Beep-only detectorist for a year, now with a metered one.
I dig all strong sounds no matter their number. But I find the meter useful, for: distinguishing as to whether there are more than one targets under a coil. If I get a certain number repeat one direction with the machine giving a certain depth, then a different and different, often there's two targets there. Something beeping couldn't tell.
The depth meter also saves time, in giving me an approximation of how much I have to dig out.
I don't know if there's any validity to this; but a cross-swing that differs remarkbly top to side in # almost always to me means bottlecap. Beep alone wouldn't be as clear.
Finally, at the end of a session, tired and lazy, I go into "cherry-picking" mode, zooming up Disc to dimes and above. Last time was at a soccer field and found 5 quarters, three dimes, 2 zincs in relatively short time.
I AM very glad I first learned on a beeper. Taught me to listen more to my ears than trying to make settings do my work. And taught me (I think, if this is accurate), a consistent tone in many passes from different directions indicates something real, not a bit of foil etc. But I do love my features and #s, depth meters, disc. settings.
Oh, finally, the psychological feature!!

Whenever I get a strong "quarter/50c" I get excited! Plus maybe a safety factor--when I do so am much more careful with my digging work so as to not scratch any potential silver.