Hi Dommer,
Both are in active development. I think Minwah is still working on his front end too.
I'm may be not the right person to compare both front end. And in fact i really don't know others front end. Before making Atomic the only Front End i tested was Advmenu under dos.
But i think functionnaly there is not lot of difference between frontend. A FrontEnd is a Front end just a menu which run programs.
With Atomic you can run all what you want. Even if you have the feeling you can not, you could always find a solution using .BAT , .VBS , wrapper...etc.. but it is the same thing with MAMEWah and others.
The difference between FE are mainly configuration tools , and layout capabilities, and documentation.
The weak point of Atomic is Documentation (not really up to date) , and configuration tools could be better. (i never tried MAMEWAH so i can not compare , it is just my feeling).
Now, i 'm concentrated on the development of the engine of Atomic and try to make it the "ultimate FrontEnd" (i know it is pretentious!..

But it is just to chalenging me!) . Then i will concentrate on the Configurations tools and Documentation.
the next version of Atomic will have lot of major new things not yet visible on others FE.
I try to give a really Active Support and really try to solve all issues you could have.
But, here too, MinWah is very Active too.