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SPL token
An SPL token is a token on the Solana blockchain, created through Solana's Token Program. Each token is defined by a mint account that records its supply and decimals, and a wallet holds each token in a separate token account.
What it means for you. A token's mint account can name a mint authority, which can create new units, and a freeze authority, which can stop tokens in your account from moving or being burned. Check whether those authorities are still set, and check the mint address itself, since names and symbols can be copied.
Sources: Solana docs: Tokens on Solana, EIP-20: Token Standard · checked 4 October 2026
ERC-20
ERC-20 is the common rulebook for fungible tokens on Ethereum, where every unit is identical, like dollars. It sets a shared list of functions—check a balance, send tokens, let another address spend them for you—so any wallet or exchange can handle any ERC-20 token the same way.
What it means for you. The approve function lets you give an app permission to move your tokens later, often for an unlimited amount, and that permission stays until you revoke it. Anyone can deploy an ERC-20 contract with any name or symbol, so the contract address, not the ticker, identifies the token you hold.
Source: EIP-20: Token Standard · checked 4 October 2026