KHS Green, which I also like very much. And to me, this just confirms that even if you give a good designer a small budget, and limit them to modern production techniques and components, they can still come up with something that looks visually pleasing - not only in carefully lit catalog photos, but in person, up close.
Brompton I test-rode earlier. I am not sure why, so cannot really elaborate. Perhaps I need to ride the Brompton again to get a better idea. And of course, the quality and the functionality of the bicycles are different: The Brompton is undoubtedly better made and it is a folder, while the Boogie is in a lower budget category and does not have the folding capacity - so in comparing how I felt on them, I am speaking solely of the test-ride experience.
If you are looking for a simple city bicycle on a budget, this is one of the few in the lower-priced category I actually like. The proportions and small wheels are not for everyone, but I find the overall design and ride quality appealing.