The version which cuts back and forth between aspect ratios is exclusive to Walmart, it's called the "Big Screen" edition. Other versions use the IMAX footage, but it's been reframed so as to not cut off important things in the top of bottom of the 4:3 IMAX frame.

You can read reviews covering both versions here:
http://bluray.highdefdigest.com/2638/transformers_revenge.html
http://bluray.highdefdigest.com/2780/transformers-revenge_imax.html

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris