Show us a pic of the bases side by side. I can't see by that pic but they look awful similar to me. Is the weathering similar? They look like a match to me but what do I know....
I agree - with what though, I have no idea. I just did the same thing and found a great shed without luck on the 2nd side. It might be a match or a year later than one I have here - I am clueless. Mostly though, I am headed back out to see if I can find the answer.