ERC20 and TRC20 are both popular standards for creating tokens on different blockchains. ERC20 tokens live on the Ethereum blockchain, known for its security and established ecosystem. TRC20 tokens reside on the TRON blockchain, which boasts faster transaction speeds and lower costs. When choosing between them, consider your needs. ERC20 offers wider adoption and more established tools, while TRC20 might be better for cost-effective fundraising or fast transactions.