Yeah, I saw this on fleabay too. I got all excited when I read the description, but then I saw the picture. Poor Midway mini... I agree that it looks like an Omega Race or a Gorf. Only way to tell for sure is to look under the control panel.
Yeah its hard to tell.. I guessed Gorf because of the shape and the two speakers. I guess O.R. would have had two also. The coin door is wrong for Gorf though.