They both act. They both design shoes. And their booths were right across from each other at FN Platform. Sounds like a recipe for celebrity rivalry. Turns out, it was anything but. Yeardley Smith (of “The Simpsons” and founder of Marchez Vous) and Emmanuelle Chriqui (of HBO’s “Entourage” and Charles David’s newest collaborator) are actually professional pals. The two shared the Broadway stage in 2011 in Nora Ephron’s “Love, Loss & What I Wore,” and exhanged plenty of stories and laughs last Wednesday in Las Vegas.