Question about the difference between wBTC on Ethereum vs Cardano

Both Cardano and Ethereum allow Bitcoin to participate in DeFi ecosystems via Wrapped Bitcoin (wBTC).

A key difference is in transaction fees: on Cardano, you can pay network fees using wBTC (so called "babel fees"), whereas on Ethereum, fees must be paid in ETH. This flexibility on Cardano could be more user-friendly for those holding Bitcoin.

Aside from maybe lower transaction costs/scalability, which could make wBTC transactions more efficient and cost-effective on Cardano compared to Ethereum, are there any other advantages?

Short story short: What are main advantages of wBTC on Cardano, compared to Ethereum? Why would someone choose to wrap their BTC on Cardano instead of Ethereum?