Dey, that's for convenience sake mah. The first Mk II (1696) was
PS-bodied. Anyway, regardless of who built the body kits, all also
have the single round headlights.
BTW, seems like nobody has a clue what was the name of the range of
DM body kits used on B10Ms (pre-1997), O405s, Darts & Lances.
The only identified ones are DM3500 (1996/97 B10M Mk IV) and DM5000
(Trident).
Also, why do the 3rd-gen Scania come with only one type of body
kit? The closest DM body I can imagine on a Scania would be DM3500
CRL.