Time to chip in after months of savouring as a voyeur the peculiar charm of the BA board.
I did a RTW trip in F last year, but this year I'm going to do it in Business and spend the saving on hotels. 2 main reasons. First, the quality of the food depends entirely on the departure point and is very variable. Second (this is where I light the blue touchpaper and step back sharpish), the quality of the service depends entirely on the couple of individuals allotted to your flight and their mood that day - again, very variable, and disappointingly charmless on too many of the segments I've flown in the last few years. Yes the beds, pyjamas, and wines are great, but I'd say not enough to justify the difference if you're paying yourself unless you have bottomless pockets.
Sorry Pucci, and I'll say ouch in advance.