Globalstar flies highest, with orbits at ~1400 km. Starlink is at ~340-550 km. Per satellite, a higher altitude sees a larger portion and provides greater angular visibility of the Earth's surface at any one time. Globalstar is suited for low-power devices, emergency sat messaging, and IoT, not broadband speed. One reason they made a good fit with the iPhone. Also the valuable spectrum.

9.6Kbps

Not a joke

i would think that globalstar is specialised in IoT and Starlink more as an extention of the cellular coverage.