No question - Skylines are bad*ss, but keep in mind the Supra in that clip had a stock motor, and basically just a bigger turbo, a chipped ECU, and a free flowing exhaust, along with suspension mods and tires. With a stock motor and stock rods, the best you can hope for is a 7K to 7.2K redline.
In addition to the Supra's mods, the Skyline had a built motor - most likely with rods that were good to 10K.
So to build that Supra, you'd probably spend all of $5K to $7.5K, but to build the Skyline, you'd be looking at an additional $10K to $15K motor build, minimum, on top of that.
And that's to get around that circuit 4 seconds faster than the Supra....
Not an apples to apples comparison, IMO, but still entertaining!