Main differences:
1. Stinger has 'gauge mode'. Mosquito DOES NOT have 'gauge mode'.
2. Mosi has user replaceable batteries. Stinger batteries must be replaced by an authorized Suunto tech.
3. Stinger is stainless steel. Mosi is plastic.
4. Stinger has a mineral glass face. Mosi has a plastic face (scratches easily).
5. Stinger is heavy. Mosi is light.
6. Stinger looks better, especially over time. Mosi glossy finish will start to peel off over time.
7. Stinger uses an older pc interface. Mosi uses the same pc interface as the cobra, vyper, and vytec.
8. Stinger is water resistant to 200m. Mosi to 100m.