Zapaka Women Black Tie Dress Halter A Line Sleeveless Ruffled Simple Long Formal Dress, Black White US14 Long Satin Prom Dress with Shoulder Ties PromGirl Burgundy Small Shoulder Tie Long Satin V Neck Prom Dress BD105 Emerald XSmall Women's Tie Neck Cocktail & Formal Dresses Nordstrom Rack A Line Long Prom Dress with Shoulder Ties Dark Sage XSmall one of these dresses is formal, the other is black tie can you tell me which is which? i tried to be sneaky so let me know how you did in