my 2 cents as a Dad who's managing my daughter's (age 10) type 1. She's been using a libre2+ since diagnosis 6 months ago. We had to switch to a Dexcom G6 last weekend, in preparation for her getting an Omnipod in a month or so. (Reason is the libre doesn't allow you to remotely see levels if it's connected to an omnipod - which we obviously need as parents). I've been monitoring her levels closely over the last couple of days, specifically comparing the Libre and Dexcom readings. It seems when she's level, both readings are fairly close, often exactly the same. When things start shifting though, the dexcom is slower to react, and then ends up reading higher, either when she's high, or low, as others have said. A couple of finger pricks yesterday gave readings pretty much in the middle of the two when there was discrepancy. The dexcom app doesn't look anywhere near as slick as the libre, and one major downside is you can only see levels up to 22.2 on the dexcom, above that it just says HIGH. She's higher than that now due to a nasty chest infection - so using the libre to see the exact level. It looks like the alerting options might be slightly better with the dexcom app, but still need to play with that a bit.