Skyline: Neg- narrow part availability, sump issues, need deep pockets to mod, RHD if that's an issue where you live Pos- ATTESA AWD, versatile for all conditions (drag, auto x, circuit) body styling, rare, Engine/ Exhaust sounds so ridiculously good Supra: Neg: RWD if you're in the rain and hit boost , LHD will cost you almost the same as a Skyline, a bit uglier than the Skyline imo, traction issues, not as nimble as the Skyline out of the box, Pos: Parts available almost everywhere, cheaper to own RHD vs LHD, mods mods mods, classic Toyota reliability, Bullet Proof motor, higher potential for pwr at lower cost Both being cult classics i'd say if money wasnt an issue get an R34 Skyline GTR just b/c the styling, rarity and its the last of the Manual GTR's