They are two completely different products...inReach hangs on my backpack and works for 20 days without me touching it and it's $14.99/month, and I don't need a phone. I don't even have to look at it after turning it on until after I'm back in civilization.
I don't use mine as a communicator as I like being disconnected when backpacking, but it still transits my location every 30 (or 10, or 5, but I usually use 30) mins in case something happens. I also have the emergency button if need be. I take it on long weekend trail runs too, as the area I go doesn't have any cell service and it's a closed forest canopy.
How is Starlink working when your down in a deep valley and can't even see the sky?