On the upside down back, I have 2 variations on the front. Look closely at the "America's Got Talent" statement - on one the final quotation mark is above the T in Terry below it - on the other one, it's above the "rr" in Terry below it.

On mine with the right side up back, mine has the final quotation mark above the "rr" in Terry below it. It looks like you have the final quotation mark above the T in Terry below it.

Also, on your right side up back, you have the 2 white insert arrows at the bottom - mine has them on the top.

I love finding these tiny variations. Now there's more keys to chase.

Esther