The main CRM difference is you don't have to worry about the "cabin" when you have a problem. So you don't have to worry about briefing the FA's. Note, the FA's can be a good source of info too so freight pilots lose that. You don't have to worry about talking to the passengers and using non alarming language.
Between the flight crew, ops, ground crew there's no difference.
To sum up, you have less people to communicate to.