It somewhat depends on wheel design as well. Forged aluminum is stronger than the lighter magnesium, but because of its design, the RE-MG that came on the Mines Skyline will be stronger than the FI-R. Unfortunately, it's also heavier.
BBS RE-MG: 18 x 10.2 = 18 lbs
BBS FI-R: 19 x 10.5 = 17.5 lbs
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