It seems that TornadoFx is just a Kotlin version of JavaFx. I suppose this depends on what your goal is then.
JavaFx will be more widely usable, and can be used in future Java projects without the need for the Kotlin-wrapper. You can always learn both (which you might do automatically when learning TornadoFx, as it is based on JavaFx)
No problem. If you have any questions, the #tornadofx channel is full of really helpful people.
Ruckus
08/08/2017, 2:00 PM
I realize if you don't already have a JavaFX background, the motivational example on that page might not be as impressive, but the amount of boiler plate cut out by using TornadoFX is staggering.