XRAY - Model racing cars

Has anyone else ran different shock springs aside from XRAY light blue? I've been seeing people use mugen grey springs but I don't know if they're the regular springs or the big bore springs. What would the difference be between the light blue and the mugen greys? I've been loving the blues so far but having different spring options wouldn't hurt either.

The xray light blues are going to be a little stiffer and more progressive than the mugen greys. The mugen greys tend to calm the car down some and give it more traction. I like the Xray white springs because they seem to be the best of both worlds, they are edgy and fast like the light blues but also give the car more traction than the light blues because they are softer, but still progressive.

The fastest laps I've turned at my local track were done with the Xray white springs.

Rocco did you use the whites in the front and back? What is the style of your track because I was thinking of trying the whites myself.