Maybe they prefer sticking to their own syntax code instead of looking at the badges of the vehicles.
Anyway, I have a similar bone to pick. Mitsubishi "L-200" and "L-300". Why the hyphens ? There aren't any ! Never have been.
Could we change them to L200 and L300 ?
As for the Hiace/HiAce thing, I started using "HiAce" a long time ago, because of its LiteAce/TownAce/RegiusAce siblings. And yet I use "Hilux". Go figure.