Road car.
Production-based racing car. Must use original body shell, with modification permissible for strengthening (including additional welds) and safety (including interior skin panels) purposes. Roll cage, race-grade fuel tank, polycarbonate windows, homologated seats and harnesses, rapid release steering wheel are commonly mandatory, and some grades use regulation engines and subframe assemblies.
Tube-frame racing car. Very rarely shares any significant parts with the road car, although floorpan and basic powertrain layout are common - engine and gearbox are similar to, but radically different from, road version. Body panels usually superficially similar, but not identical and commonly made of lighter weight materials. Rear-wheel drive by regulation.
Tube-frame racing car. Very rarely shares any significant parts with the road car - similar to GT3, except for different regulation set for rally vehicles. Bespoke engine, gearbox, drivetrain and four-wheel drive by regulation. Required to be road legal, including full lighting and IVA regulations.
Road car based on rally car, commonly required for series homologation purposes. May not be related in any way to original road car. Will share power/drivetrain components with Group B rally car, but commonly slightly sanitised for daily road use and normal service intervals. Full interior, no roll cage, normal standard road glass (sometimes side windows remain polycarbonate), seats (sometimes remaining as racing models), usually seatbelts (requiring road legal fixings) rather than harnesses.
It's like you've seized on these five cars as being the same thing because they all have "Evo X" in the name, when really they're all rather different - as every other part of the name should tell you. Would you consider the GT-R Nismo and the Nismo GT-R as duplicates, despite one being a four seat, four-wheel drive, 600hp road car and the other being a single-seat, LMP-1 class, 1,000hp hybrid? Probably not.
If you're going to point to duplicates, there's two almost identical M6 GT3s with different liveries to look at.
Click to expand...