This is the Amuse body kit:
You add a big wing when the car had none, front and rear diffusers, and canards. Since it's a widebody kit, you also can run a lot more rubber under the fenders. Overall it makes a big difference on the S2000.
The factory S2000 produces lift at any speed, and the CR doesn't do near what the NISMO package did for aero. So for the S2000, yes, the Amuse kit would make a big difference.