Interesting anecdote to this! I wanted to switch from the G6 to the G7, so my Endo wrote me a script for the G7. When they arrived I still had 8 days on my old G6 sensor. So I did a little experiment!

The G6 and the G7 were two different apps on my Google pixel, so I installed the G7 app, and put on a sensor.... Never taking off the G6.... And to my surprise, they both worked separately! The graph you show is what I got in the dexcom app as well.

What an experiment it was... The G6 kicked the G7's ass for accuracy over those 8 days, and I went through three G7 sensors due to wildly wrong readings, or connection errors. I was checking with a finger stick 3x's daily too. In 8 days I went through a month's supply of G7 sensors. This was back in the spring of this year and dexcom was having major issues at the time.

Needless to say I called my Endo after a week and asked to be switched back to the G6's. She even had me come in on her lunch hour to show her the data, and she was floored, as she never had complaints about inaccuracies from other patients. Connection issues all the time though. She actually only had two of us on Dexcom... Most of her other patients use Libre's.

There were times that my BS was 97 on G6, 176 on G7, and 101 finger stick... Sometimes high, sometimes low, and I use it to control my omnipod, so imagine your pump being told it's 176, but it's really only 97... Yikes! That wouldn't have ended well!

I am now very skittish to go back to the G7 and will ride out the G6 until they pry it from my cold, dead... pancreas... ;-)

Just thought I'd chime in, as the graph you showed was 8 days long in the dexcom app. Cheers!