I've got a WF on order, but a DIY kit with Gateron switches not Cherry MX. I think the WF has the better resale value (pro) if you plan on selling later. Is that even a consideration? It ought to be if you're visiting this forum on a regular basis.
Also -- and someone correct me if I'm wrong -- the stabs might be different in both boards (pro or con or neither). I've used both costars and cherry stabs and can get along with both, but some have pretty strong preferences.
Re: using as keyboard for traveling laptops/tablets -- think lightweight and overall dimensions. I'm not sure which wins that category. Also, avoid sharp corners on the case itself if you're placing it atop a laptop.
Floating keys vs. non-floating keys. I prefer non-floating, but it isn't a deal breaker for me. Some people are picky about this.
I'm relatively new to the GH community, so gather more input from others who have been around longer and have more experience. The WF will require a bit more initial attention if you plan on altering the layout to suit your specific needs, and it will require some soldering work and time if you aren't getting it pre-assembled.
The Ducky Mini is kind of cute.