I can all but guarantee you they are the same device. IDK if they are even binned differently. The software is the main difference.

The "real" device gives you what it measures as your real highs and lows while the OTC devices won't report high highs or low lows.

I have a Stelo (I was curious and diabetes runs in my family) while my wife has the Dexcom.

I t Looked into the OTC ones and it does seem they’re binned versions. The failure rate appears to be higher too, which is more acceptable in a non life threatening device.

It also probably gives the companies really valuable data.

You can read the Stelo out into XDrip with some settings adjustments, last I checked, so it is just some “light” software tweaks between sensors.

https://navid200.github.io/xDrip/docs/Dexcom/G7.html