The bitcoin network rewards miners with 12.5 new BTC every 10 minutes or so (~1,800 per day).
The ethereum network rewards miners with 5 new ETH approximately every 15 to 30 seconds (~18,000 per day).
Bitcoin's total supply is now about 17 million BTC, and will never exceed 21 million BTC.
Ethereum's total supply is now about 96 million ETH with no upper limit.