Talk about night and day!

Kristen Stewart rocked a long-sleeved RM by Roland Mouret mini at "The Twilight Saga: Eclipse" screening in New York City.

If you recall, Amanda Seyfried wore a lighter (and strapless) version of the same dress to the "Letters To Juliet" premiere in Los Angeles just last month.

While both actresses looked gorgeous, I'm going to give this one to Amanda. I love how the bright blue "discs" on her dress stand out, whereas Kristen's blend in with the background.

Which style is the right way, and which one needs to hit the highway? You tell me in the comment section below.

Photos (left to right): Stephen Lovekin/Getty Images; Jon Kopaloff/FilmMagic