Tauri is Rust, Wails is Go. Rust tooling and builds are heavyweight -- if you are using Rust already, the marginal cost is low, but if you aren't using Rust and want to minimize the weight of the tooling to get your app built, Go is extremely attractive by comparison.

Not sure, never heard of it, but looking at the README it seems similar but w/ a Rust backend?

We do a lot of data/quant analysis w/ Go which is great for that; then having the opportunity to slap on a lightweight GUI allow us to make some great internal tools etc.