Dukes was made from GTA 4 LOD, Schafter and Futo were made from GTA SA models, Bullion was built from GTA 5 LOD, and this one is made from scratch (less than five years later).
Dubsta (the name is taken from GTA 5) is practically a clone of the Mercedes-Benz G-class.
Settings are important! In principle, you can put the model without settings, but it will not show itself so well.