Personally, I'd do some web searching for user and shop reviews of the two you've picked, as well as looking over the ukes as best you can on the web. As you can see, asking such a question here results in basically a listing of user favorites among thousands of users, to where you'll be better off looking for a used Martin Koa made in Asia but produced in Portugal, Hawaiian made from native Koa, with Worth humidifiers and solid Oasis acacia strings...
Coming from a photography background, I see the benefit of how photo equipment forums are separated into brands, which makes them much more productive when inquiries are made as to the performance and qualities of certain models. Even 'experts' quickly develop brand preferences based simply on what they own or have owned, which we are all prone to developing without any regard to whether it's genuinely better or not. (and remember the old computer tech forums where a legitimate question would produce the inevitable "get a mac" replies that helped nothing and turned threads into a waste of space?).
I've been considering one of those Ponos, though in a tenor size, and possibly the cutout model, and they certainly look very decent; I also have some Kalas, and the build and tone are excellent, with good value for the money spent...the Kala you're looking at looks very nice. Since you can't play them and feel them for yourself, perhaps just user reviews would be your best bet...keeping in mind of course that no matter what it is, you'll get some raves and some shipping complaints. Asking here helps too, of course, but it certainly could make a simple decision into a confusing mess if you took everything to heart, and be counter productive rather than helping. Since you know that either will be set up well, look over the qualities of both, price, build, appearance, and sound as best you can tell online, and make your own decision. I don't think you can lose with either one of the two you've settled on, and there are lots of other choices as you discovered, but having too many choices or recommendations might just make things more complicated and take the fun out of buying a new uke. Use your best judgment, and go from there.