... plus much better UI.
I actually disagree on this point, despite it being touted as one of Gnomoria's strengths. My biggest is that the UI outbreaks under certain conditions: if the mouse cursor is hovering over the lower menu (or any window or menu for that matter), you're unable to use keyboard keys to access the items in the menu. In addition, the right click menu itself is also pretty finicky and can be irritating to use. For example, when you hover over an item in the menu, there is a slight delay before it expands that item. But if you move your mouse to a new item (say, while trying to move the mouse into the new list, but slipped onto a new item before moving to the next menu), the list immediately disappears. It could do with having the same delay in closing the menu (presuming no selection was made) as it does in opening it. Most or all of the menus and windows could also do with being keyboard-accessible, though this may require reorganization in some cases.
Also, there is absolutely no excuse allowing only a single keyboard shortcut per command; indeed, there's no reason for any kind of artificial limit at all. I don't understand why so many games fail on this, but most of them limit it to at least two and this is workable. Gnomoria only allows one, and the numpad and number row are distinct keys (although though they appear identical when binding them). This is as it should be, although it is inconvenient because of Gnomoria's limitations on binding keystrokes to commands.
These are basic issues of accessibility. If DF's interface is obtuse and difficult to learn (and I speak here only of accessing menus instructions, not the gameview or how certain information is presented), it is, at least, very functional. Well, the military and large-scale dwarf management notwithstanding. I'm not saying that Gnomoria is some weak DF-lite that sucks because of this, but just because the interface is mouse-driven over DF doesn't mean it is perfect as is, and there is great opportunity for improvement in that regard in Gnomoria.