I do not know of any car that uses less than a 190 degree thermostat for original equipment.
Benefits of a 180 degree thermostat: well, few... perhaps if your car overheats a lot, or has been modified for much more power you could benefit. Remember, at 210 degrees or more, they are both wide open, so neither will be better going across death valley. But the 180 degree thermostat would give you an engine 10 degrees cooler at the bottom of a long hill, that may help if you are towing a heavy load with a marginal cooling system.
Benefits of 192 degree: Better mileage, much better heater output in the winter, oil temperatures rise high enough to boil out excess fuel and moisture in the winter.
I believe Ford lead the parade to the 192 degree thermostat in about 1965, at the time the development studies - that they published in the SAE journal - showed that oil dilution with fuel and water was greatly reduced by going up to 192 degrees... their controlled wear tests indicated that engine life may increase by 30 percent for those using cars for lots of winter short trips. This is about the time Ford was shocking everyone with their recommended 6,000 mile oil change, and they felt the 192 degree thermostat was an important component of the longer oil changes.
Sorry to get so long, sometimes my keyboard just takes off!!
fsskier