Almost all cars look the damn same.
Yes, there are similar looking cars, but there are still hundreds of different cars that look completely different.
So...
Cars never look the same (in the exterior grand aspect) unless they have ties with each other. Many GM cars have identical models but rebadged with different names. Examples:
NOT GM: Dodge Grand Caravan/Chrysler Town & Country
Chevrolet Captiva/Saturn Vue
Chevrolet Tahoe/Suburban/GMC Yukon/Suburban
Chevrolet Venture/Uplander/Pontiac Montana/Trans Sport/Saturn Relay
Opel Speedster/Vauxhall VX220
Chevrolet Silverado/GMC Sierra
Other cars have names that differ because they are sold in other parts of the world:
Toyota Yaris (exports)/Toyota Vitz (Japan)
Toyota Soarer (Japan)/Lexus SC (exports)
Nissan Skyline (Japan)/Infiniti G35 (exports)
Toyota Voltz (Japan)/Pontiac Vibe (USA)
Toyota bB (Japan)/Scion xB (exports)
Mitsubishi GTO (Japan)/Mitsubishi 3000GT (exports)
Also, I didn't look any of this up, but am pretty confident these are correct.