It's actually two different thing or in other words different type of creating a new coin the other one is called proof of work which is like mining Bitcoin and the other one is proof of stake and can produce new coin by staking coins, the most common is the proof of stake but the disadvantage is that it consumes a lot of electricity.
So proof of work is mining other coins inside an exchange while proof of stake is mining with rig and all the heavy stuff gpu etc?