Brian, Do you mean the SP2 and the Worlds kit?
If so, the WC has the following changes:
- Narrow front pivot block
- Longer Front wishbones
- New one piece wheel hex/shaft - narrow hex
- longer front shock tower (big bore front shocks are slightly longer)
- New stiffer Servo saver plastic
Rear end geometry is the same
Think thats it!
Kev