Why is R35 not a skyline?

Every Skyline GT-R is wider than each corresponding regular Skyline, and each from R32 to R34 has a different front bumper. ... The R35 GT-R is not based on the Skyline body of the same year, therefore it is not 鈥渏ust鈥?the highest trim level of the Skyline range, and is instead its own model.Why is the GT-R R35 not considered a Skyline? - Quora