They all have something to offer and of course it's subjective.
The Kala is so cool with it's extra petite size, the Ohana still being small has a louder voice and a bit more on the detail side with binding etc. The LoPrinzi is about the same size as the sopranino but has a lot of wood choices-Honduran mahogany, Spruce/cherry(1 in stock), Hawaiian mango, koa etc, custom headstock, Grover low profile tuners, binding USA luthier made so you get even more variety. I love em all!
Lots of reasons to get any of them.