There are no special options or anything, the plaque just means it was one of the last 300 made for the USDM. As for the difference of the 96's they don't have VTC so they were rated at something like 20hp less than other years and they're OBDII. Nothing special trust me, I own a 96 and there is no shortage of power.
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Originally Posted by Automobile Magazine
The 300ZX Turbo is a dance; it's a song; it's rolling, roaring automotive art. There is no color that doesn't suit it. There is no mood-lifting chemical substance it can't replace.