What's the biggest difference between CBS's powerhouse forensics drama CSI and the network's upcoming fall spinoff CSI: Miami? Unlike the homebodies from Sin City, David Caruso and his band of South Beach sleuths will get a life.

"On CSI, our characters [are] introverts, they're science geeks," executive producer Carol Mendelsohn told reporters Tuesday at the Television Critics Association press tour in Pasadena, Calif. "The characters on Miami [are] more extroverted; they actually have a life. When work ends, they go out and eat. They just don't go home to their little apartments, open up the Journal of Forensic Science and dive in."

Consequently, viewers can look for evidence of romantic sparks between Caruso and leading lady Kim Delaney. As Mendelsohn explained, in contrast to the platonic partnership between William Petersen and Marg Helgenberger on CSI, the relationship between Caruso and Delaney will be "born of conflict. They will have a back story that makes them lock heads and it will be something we explore over the life of the series."

Still, CSI: Miami is in no danger of becoming Miami Vice. Similar to the original series, the spinoff will take a less-is-more approach to romance. "The great thing about CSI is when we have small character moments of intimacy... it becomes a huge thing on the Internet," said fellow exec producer Anthony Zuiker. "In terms of Miami, we may have a little more intimacy."

CSI: Miami debuts Monday, Sept. 23 at 10pm/ET.