What the numbers mean
Both use 640-class sensors with 12 µm pixels behind 35 mm lenses, so their reach is the same by our formula (1,750 m) and both add a laser rangefinder. The difference is in the details: Nocpix rates its sensor at ≤15 mK against <40 mK for the Pulsar sensor, uses a faster F0.9 lens and a far sharper round display, and runs at 60 Hz against 50 Hz.
The Pulsar answers with weight and stamina. At 350 g it is almost half the Vista's 640 g, and its APS5 pack is rated at 7 hours against 5.5. If you walk and call coyotes, that matters every night; if you glass from a blind or a truck, the Vista's picture is the reason to pay $300 more.