MEMBER'S CHOICE - An alternate universe where Pam and Roy had a wedding, Pam goes to art school in New York, Dwight owns a restaurant and Jim works for a job in advertising that he likes a lot more and gets a lot more money at.
Basically? Dunder Mifflin never exists. And everyone meets under different circumstances.

The characters are pretty much the same -- personality-wise -- they just have different roles and work different jobs.