Hiya Bob,
You asked me some similar Qs at the Mac Pass meetup at Casula as to why one would consider a car of contrast rather than buy another RB.
If you can make the next cruise (rather than have a prior commitment as you did then), you're welcome to ask me to bring the 8MR and then swap driver's seats for a bit.
Top Gear comparison tells a bit of the story - but not all, as you'd know...
Regards