Sending USDC directly from Solana to Ethereum will result in USDCso (Wormhole from Solana) which will require an additional swap and hence another (expensive) transaction on Ethereum. Instead, to receive native USDC on Ethereum, users should send USDCet (Wormhole from Ethereum) from Solana to Ethereum. Here is a tutorial on how to receive native USDC on Ethereum using the Portal.