JimM68 wrote:
all being equal, I'd take the Diplomat.
HR Ambassodor (and Monaco knight) depending on the year, either had the roadmaster rr8r chassis (same as the dip) or the ill fated rr4r chassis. Good/bad/ or replaced trailing arms, the rr4r is a cheap freightliner imitation, and I'd not touch one. Monaco does better.
If the ambassador you're looking at is new enough to have the rr8r chassis, it is pretty much identical to the Dip, the dip has an ISL400, the knight/ambassador has an ISC, 350 or 360hp depending on year.
I'll take a Spartan chassis over any you mentioned.