When comparing Ionic 2 vs Fuse, the Slant community recommends Ionic 2 for most people. In the question“What are the best frameworks for developing cross-platform mobile apps with JavaScript?” Ionic 2 is ranked 8th while Fuse is ranked 10th.
Specs
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Pros
Pro Android, iOS and Windows Phone compatible
Pro Deploy as PWA
Pro Native functionality via Cordova plugins
Pro Built on Angular 2
Pro Compiles to native platform code
A key difference is that Fuse uses JS exclusively for app logic while producing native code for everything else, including population and manipulation of the UI.
Pro Native performance
Pro OpenGL UI
With the option to use OpenGL based UI components, Fuse is the only of the three platforms that offer a reliable “write once, run everywhere” approach where designers can control responsive layout, look and feel down to points, pixels and percentages, keyframes and easing curves.
Cons
Con Old version
No point keeping this here, is the old version of ionic.
Con Uses WebView which impacts the app performance
Con Little reuse of web knowledge
Fuse doesn't support Angular or React so there is little reuse of existing web tech knowledge. The team have said they are exploring Angular 2 and then maybe React though.