The Forge 007p was the "original" upgrade for a recirculating turbo engine like the 1.8t. Extremely popular with the 1.8t crowd - I've had one fitted for about 8 years and never had a single issue. The 008 is Forge's recent updated version to the 007 - not sure what the difference is, im assuming they've improved the material or something but tbh there was nothing wrong with the 007 however you may only be able to get the 008 now as it supersedes the 007?
As for spring colour the standard spring they come with is green, then yellow and red increasing in stiffness. Generally the more boost you're running the stiffer the spring you need to fit. Again I've still got the green spring in mine and I'm stage 2 Revo with 230bhp, no issues whatsoever and was advised by the tuner to stick with green.