The cheese vs dessert question is relevant because BA is notorious for only allowing you to have either cheese or dessert after the main meal whereas other airlines will serve you both.
Ah yes, but what's offered during a
media flight is likely going to be very different to the real world... assuming that BA
did allow journos on the charter flight to chow down on a trio of desserts would have no bearing on the multi-dessert scenario once premium dining service rolls out.