WETH (on Ethereum itself) is totally different. It's a pretty simple contract, doesn't require code on other blockchains or offchain code, and there are no Ethereum accounts with "special permissions" so the attack surface is much much smaller.

Contract code if anybody is curious. It's less than 100 lines of Solidity, easy to read even if unfamiliar with the language: https://etherscan.io/address/0xc02aaa39b223fe8d0a0e5c4f27ead...