[2ndclasscitizen]

Ok, so of the 6 pics you posted, the first 3 are VZ and WL model cars, which are based on the old Holden chassis dating back to 1978 VB Commodore which was a modified Opel Senator and are a Statesman, Caprice and SS-Z. The next 3 are VE and WM cars, based on the all-new, Holden developed GM Zeta chassis, and are a Caprice, Omega and Statesman models. Basically, the Statesman and Caprice are long-wheelbase luxury models, with the Caprice being the highest spec cars, with the V8 as standard unless you specify the V6. The Commodores are normal wheelbase, mass-produced cars. The VE Omega is the base model, lowest-spec car. The you have the Berlina, Calais, SV6, SS and SS-V in the VE model cars, which are increasingly higher in spec, with the SV6, SS and SS-V being sport models. The SS-Z was just a special model VZ SS Commodore with Monaro wheels and brakes.

The differences between the VZ/WL and VE/WM cars are huge. The VE is a vastly superior car. You'd buy a Caprice instead of Statesman if you wanted the extra options and could afford it, and get the LWB over the SWB if that's what you wanted.

http://www.holden.com.au/ will answer all, then go to HSV - E series