Mary-Kate Olsen, Ashley Olsen jewelry black and white ChelseaPiers New York Chelsea Piers Can you guess which one's which?

Mary-Kate and Ashley Olsen walked the red carpet together for the Fresh Air Fund Salute to American Heroes on Thursday in NYC, and although we usually can't tell the difference between the twins, this time they made it easy on us and rocked their signature styles!

Ashley, who goes for a more conservative and classic look, wore a white sheath dress from her own line, The Row, paired with Manolo Blahnik sling backs. Mary-Kate, on the other hand, has eclectic boho style that she showed off in a dress, also by The Row, with colored Fendi peep toes.

Something about these pint size fashion designers drives the men wild! MK is enjoying a brand new romance with Olivier Sarkosy, the half brother of French president Nicolas Sarkozy. Oh la la!

Ash, on the other hand, hasn't been spotted with a man for a while, but we're still curious about those Johnny Depp hookup rumors. Where there's smoke, there is usually fire!