Complex sentence: The car is driven by the rear wheels, just as the Cadillac ATS and the 2014 Cadillac CTS, while the Elmiraj is "constructed with chassis and structural elements of an ongoing Cadillac vehicle development project slated for future production".
Split into simpler sentences: The car is driven by the rear wheels, just as the Cadillac ATS and the 2014 Cadillac CTS, but not sharing the same platform. The Elmiraj is "constructed with chassis and structural elements of an ongoing Cadillac vehicle development project slated for future production".