Like others have said it's down to personal choice. Your learning techniques for operating in a dual pilot environment nothing more. That's not to say the course can't take in other pertinent points though.
I've chosen a provider that does the course on a heavy jet. Not only as a 'reward' for my hard slog during CPL IR, but also as it includes an element of JOC and is extended with some LOFT (Line Oriented Flying Training) thrown in as well, and as a bonus the opportunity to hand fly a bit.
People will harp on about just the tick in the box, but if prior to interview you have to shell out £500 for some sim lessons on type anyway, it's 6 of 1 and half a dozen of the other. You'll end up paying either way
Horgy