From their FAQ

With WinApps you do the bulk of the setup manually, and there's no cohesive interface to bring it all together. There's a basic TUI, a taskbar widget, and some CLI commands for you to play with.

WinBoat does all the setup once you have the pre-requisites installed, displays everything worth seeing in a neat interface for you, and acts like a complete experience. No need to mess with configuration files, no need to memorize a dozen CLI commands, it just works.

Hey, I made that. Fun 😆

I've tried both. WinBoat is on a whole different level of easy. You just download it, click next about 3 times and you have a working Windows VM providing Windows apps that run alongside your native linux apps.

It doesn't get any easier than this.

Never tried but I read many people complaining that it's very hard to remove/revert