As far as I know, all planes originally are sold as if they were refurbished planes because if they didn't EK might oversell the F cabin (18 vs 12 seats.) As Emirates777 said, you will only find out 3 days before.

If the EK website says TV and Radio, I'd take that as saying there is a good chance it is going to be an old 777-300. There is no plane that was Tv and Radio but with the new 77W style seats in F.

Cheers,