it depends on the coin and project. some are similar some are different. shiba had a 100 quadrillion starting supply, some coins have the same some have less. shiba didn't burn coins, some coins do, some coins don't. shiba gave half its supply to Vitalik Buterin, creator of Etheruem, some coins do, some coins don't. Some coins burn 50% of their initial supply and some don't. Some coins give 2% rewards to holders and 2% to their burn wallet to lower the supply, and some coins have different percentages. Some coins are involved with nft, some are involved with gaming, some are involved with financial stuff, etc. Shiba picked up a lot of momentum when it got listed on some exchanges and thru word of mouth. It got affected when Vitalik donated his coins or some of them to an india covid relief fund but it got its momentum back and is now making a run. other coins have been gaining momentum as well cuz the market is hot and there's lot of talk about the potential of the coins and things that may be different than how shib did things that could be beneficial. Shiba has the juice, but the other coins been pouring some in their cups as well.