What's the difference between hot sweating and exercise sweating? Can both lose weight?

Sweating is to dissipate heat. In this respect, they are the same.

There are also differences:

1) The heart rate is higher during exercise and lower in hot weather.

2) Exercise and sweating consume a lot of energy, and a little in hot weather.

3) Sweating during exercise (lasting more than 20 minutes) consumes fat, and sweating in hot days does not consume fat.