I have not found modern pre-hardened emulsion color film from both vendors (Fuji and Kodak) to be any more scratch prone than b/w. If you worry about bellows factor, get a 4x5 reducing back for your 8x10 and test with 4x5 Fuji FP100C45 instant film. Due to its size (4x5) it will only show you the center of your whole 8x10 image, but that is enough to judge exposure. Test with instant 4x5, replace back with 8x10 back and shoot. If you focus with the 8x10 back in place, when you replace with 4x5 back, the image will probably not be in focus, but that doesn't matter, you are testing for exposure, not focus.
Hint: You have to allow for bellows factor for ALL films, not just for color.