They are one and the same. They are the OEM SVT kits with rear sway bars. If you have a 2000-05 ZX3 or ZX5, you'll get a 0.5" drop without a degradation of ride.
While Amazon is a good place to buy these products, supporting the guys who support our forums is a better deal. You can get the M-3000-ZX3 kit for $247 + shipping via Tousley or Hillbish. Shipping costs depend on where you are. Talk to Tousley if you're in the central, mountain or west coast. Or Hillbish if you're on the eastern seaboard.
I just purchased the SVT dampers with 1.5" drop FRPP springs and a rear SVT sway bar for a total of 390 (shipping included). The bar was bought off of a FF member for a lot less than actual cost.