What's The Big Frigin' Difference?!

You already know Gabrielle Union "Brings It" when she shows up, and in these two blazin' pics ... she sure is showin' out! Put your best foot stiletto forward, and see if you've got what it takes to strap in the discreet changes!

The hot momma of four was just in NYC promoting her summer rom-com "The Perfect Find," and she was lookin' boss in an all-gray 'fit, paired with some brown heels ... and she wasn't the only one wearing snazzy shoes!

Before she reunites with her baby daddy, Dwyane Wade, can you find the minor alterations?

BRING IT ON!