Just finding an unmodified R34 Skyline GT-R is rare enough.
The Nissan Skyline GT-R certainly wasn't unheard of outside of Japan prior to the GT-R breaking off to become its own model with the introduction of the R35 generation. But even the relatively recent R34 was made in much smaller numbers due to a lack of availability in many markets. As a result, it isn't widely appreciated or even known in many cases just how much or how little the car was changed between the generations, but now we have a side-by-side comparison.
Since these are different generations of the same car, this isn't a simple "which is better" comparison, but it's still definitely worth watching.