Differences between render engines can be annoying like that. (That's why I never try to get a mat perfect when modeling, but rather just use it as a reference placeholder. That kind of thing really has to be tweaked in the rendering environment.) Ironically, I had a model I was playing with not too long ago where I wanted something to be plastic. But instead of the orange color I wanted, any scene lighting would blow out the color to some funky yellow shade. I think the highlight channel has the most to do with stuff like that. Took a bit of tweaking to get to behave properly.

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Barbequed Pixels?

Your friendly neighborhood Wings3D nut.
Also feel free to browse my freebies at ShareCG.
There might be something worth downloading.