Fuji FP100C colour film beats any Polaroid film I've used into a cocked hat in terms of faithful colour reproduction, the emulsion seems a lot more hard-wearing as well (I never get 'spots' on Fuji prints, whereas I do in Polaroid - both in a Polaroid pack film holder.)
As far as I'm concerned, Fuji's is just all-round better to be honest. I particularly like the matt finish version.
The downsides: Not good for emulsion lifts, and they don't make anything larger than 4x5, and the 4x5 they do make is only available in pack film. (If Fuji made single-sheet instant material, I wouldn't be mourning the loss of Polaroid at all... I still hope that they now start.)