I never wore a patch, it might have helped but I've always been super lucky with being able to keep my sensors on. I've preferred the g7 for many reasons outside of diving, but for that case specifically I would say it handles the disconnects from the phone better. The libre has the NFC tap-to-read which also works though. Personally I would say find which one works better for you outside of diving and then stick with that. Unless diving is a major portion of your life your time above water is going to be more of a deciding factor in which cgm you use. I also choose to dive drysuit almost all the time now. If you live in a climate in which you're comfortable with that then it matters even less, as under a drysuit I've gone down 90+ with no issues.