I saw many upcoming projects are offering same kind of ERC 20 token which can get through any Ethereum wallet. It doesn't need any specific wallet. On the other hand hand some crypto companies have unique code and they have specific wallets for their tokens. I am a little confused which kind of token is better. ERC 20 or either the unique one ?
With ERC20 your token is secured by the Ethereum network.
Custom made blockchains outside the top 20 in market cap are easy 51% attack targets.
If your coin does not need its own blockchain I think ERC20 is better.