For finding animals, thermal usually wins because it shows body heat in total darkness and fog, and a warm animal stands out against a cooler background. Digital night vision gives a more natural picture and can see through glass. The Ocelot 480 35mm is thermal, so a hog in tall grass shows up bright on a moonless night.
A thermal sensor responds to heat, so the Ocelot works at noon the same as at midnight. Daylight use is handy for zeroing and for spotting animals bedded in shade. Switch the scene mode between City, Rain and Forest to suit the background you are looking at.
Most hunters zero a thermal at 50 or 100 yards, matching the distances they actually shoot. Use a heated target or one with metal tape so the point of impact shows up clearly. The Ocelot offers one-shot zeroing and stores 5 zero profiles, so you can set up different loads or rifles and switch between them.