Yes, there is a small notch on the bottom part of the cleat. & the top 'pointy' part of the cleat is ever so slightly different.

I guess I thought that when I clipped in so easily, that I would clip out just as easily. Boy was I wrong!

There is apparently more than one kind of Shimano cleat. Not fair.

I will go to the LBS to get cleats for the ebay shoes. It's just not that close, so I was hoping to avoid the drive. When one buys shoes for a dollar, one shouldn't complain.

ETA: the cleats that came with the pedals are in the other pic.