Answer: one is President Obama, the Kenyan anti-colonialist himself, forcing a US Marine recipient of the Congressional Medal of Honor to drink a beer with him at the White House, so his press secretary to could take a picture of this on his phone, tweet it to the universe, and gain some political advantage from it. Because this President "uses our most precious assets 4 personal gain."
The other picture is President Bush, spontaneously giving a speech on a spontaneously decorated aircraft carrier he spontaneously arrived on in a flight suit, just to show how much Real Americans (TM) support our brave men and women in uniform.
< /sarcasm >
After the long 8 years of hollow photo ops that made up the Bush presidency, you'd think people would be able to make better distinctions.
And let us not be confused, if Obama's press folks had not released pics of the President having a beer with Meyer, the same people would be complaining that the lack of it demonstrated Obama's contempt for America and her Armed Forces.
Because this is America, and there's a whiny subset of our society who has to turn anything involving this President into a political fight. And they do so even with stories of unrivaled heroism.
Because with them, the narratives are more important than reality.