The difference for new contracts implementing ERC-20 is that tokensToSend and tokensReceived hooks take precedence over ERC-20. Even with an ERC-20 transfer and transferFrom call, the token contract MUST check via ERC-1820 if the from and the to address implement tokensToSend and tokensReceived hook respectively. If any hook is implemented, it MUST be called. Note that when calling ERC-20 transfer on a contract, if the contract does not implement tokensReceived, the transfer call SHOULD still be accepted even if this means the tokens will probably be locked.
        (bool success, bytes memory data) = token.call(
            abi.encodeWithSelector(IERC20.transfer.selector, to, value)
        );
