They pretty much drive the same and have the same RB26DETT engines, but with different ECU tuning and exhaust.
The advantages are AWD, reliability, and high potential engines like the Porsche 911 engine and the Toyota Supra engines, which make 1000HP+ with modifications.
The disadvantages are too expensive because of high resale values(good thing if you already own one), expensive to modify and maintain, premium fuel required.
Also, for some reason, so many people think the Skyline GTR R34 had 500HP stock. But it does not. It only has 276HP from its twin turbo engine and goes from 0-60mph in 5.2 seconds. The same as a current Nissan 350z.