Ahh. I don't get the cellular version, only GPS. So it's literally the exact same device except for the glass? That hardly seems worth a new number in the Apple ecosystem.
So I pulled the trigger to upgrade from the 7 to the 11. For me my battery life is abysmal on my 7 so an upgrade to that is worth it. But I also went from 38mm to 46mm version. Plus the new wrist gestures and the hypertension and sleep apnea health upgrades are worth it to me to test out. The upgrades are worth it to me but not justifiable to upgrade to the Ultra versions. The cost alone is not worth for the few upgrades of the Ultra.