I've got the original (black) Sculpt Ergonomic and what I like about it, is that it has a separate numpad. Which I don't use, so more space for my mouse and trackpad It uses a little USB-A dongle, though.
Really hoping this new ergonomic version comes without a trackpad but I'm not counting on it. In any case, it's excellent hardware and I love the new color. And it uses bluetooth, which is really nice.
I ultimately chose this vs the Surface keyboard and i'm very happy with it http://matias.ca/aluminum/wireless/
its essentially a carbon copy of the wired Apple one. Great quality.
The Surface one would be a no brainier if I wasn't already into Apple's ecosystem, though.