The C&A Razor is the most aggressive ski out there. If you ever go to a Snow Cross race, you will notice that every rider regardless of the manufacturer, uses the Razor. I had them on my Attak last weekend. The skis went where ever I pointed them but they do require a lot more steering effort. The skis are best in loose snow conditions rather than hard packed trails.
C&A skis, in general, have the largest keel that provides the best bite in the corners. Slydogs seem pretty popular because they have more keel than the stock ski but not as much as a C&A. Members have reported than the Slydog ski requires about 10% more effort than the stock ski but provides more aggressive cornering. Pilots and Simmons rely on dual carbides to provide the bite, which offers less steering effort than a deep keel ski.
To eliminate darting, you best option is to shim the ski. It doesn't seem to matter which brand of ski you have.