All Jessicas Aren't Created Equal ... Just Bitter

10/20/2008 3:52 PM PDT BY TMZ STAFF
Millions of women would love to be mistaken for Jessica Alba, but Jessica Biel ain't one of them.
Jessica Biel: Click to watch
A Las Vegas fan found out the hard way that Biel's biggest similarity to Alba isn't her first name, good looks or box office flops ... it's her sour demeanor.