@Ureout . The mics on the end of the receivers will mainly work in low-background noise situations. Sound processing will be increasingly switched to the behind-the-ear mics on the HA bodies as the environment gets noisier, AFAIK. I wonder if part of your improved hearing with the M&RIE receivers could be from wearing a more occlusive fit designed for molds made to hold the M&RIE receivers?
For me, the WOW moment with M&RIE receivers was hearing a bird chirp in a tree in our yard. The sound came to my ears as if it were shot from an arrow from the branch the bird was sitting on. My brain knew exactly where to look for the bird. But maybe it was just a particularly shrill bird! Normally, the localization effect is more subtle than that, but it’s definitely there for me. Except for the perception of enhanced bass with the Lumitys***, the overall sound is excellent and quite comparable, and I get long-lived disposable batteries plus all the MFi connectivity in addition to Smart 3D app control via my Apple Watch. I opted to leave the Restaurant program out of my allotted four HA programs. I have All-Around, Front Focus, Outdoors (for wind noise), and Music. My Omnia 962s have a telecoil option, but my audi tells me to turn that on, I’d have to sacrifice one of the other programs. She consoled me by saying that telecoil is very little used in San Antonio, TX. Hoping BT LE Audio gains traction soon and the Omnias are upgradeable. BT LE Audio would be in stereo, whereas telecoil is monaural, AFAIK, anyway.
*** Turning the bass up to +6 and mid-tones and treble down to -2 each in the Sound Enhancer, if one wants enhanced bass, and then adjusting the overall sound volume works well to provide enriched bass without having to get a HCP to make a fit adjustment.
Edit_Update: Another thought, @Ureout, on the better hearing with M&RIE receivers, is that they might benefit from the natural pinna amplification effect. OTH, ReSound only advertises better sound localization as a benefit of M&RIE receivers, not sound amplification. Maybe the artificial average-person pinna effect in place for strictly behind-the-ear mics also includes an artificial pinna amplification factor? (I’ve already mused about this in some other post lost in the vast plains of this forum!). But I thought the Lumity Sound Enhancer feature for soft voices was going to beat the pants off the Omnia, but with my M&RIE receivers, just as you found in your experience, my wife’s very soft, not Germanically-articulated voice (no biting off of consonants, etc.!), comes through loud-and-clear, very comparable to the benefit the Lumity Sound Enhancer feature conferred. I’d love to know why?!