I'm never ridden the Black Crow (also couldn't find the "canon" but guessing it's the same as the "camox"?) so can't compare more than simply on specs/dimensions but I have extensively tested the Masterblaster vs. both the Enforcer 93 and 100 so can definitely shed some light there.
The most unique thing about the Masterblaster is it's light metal construction using only 50mm sheets of titanal that don't go edge to edge or tip to tail which gives you all of the dampening and torsional rigidity benefits of metal while maintaining a youthful, lively feel to the ski. This blend of powder and precision gives you a gentle nudge to go faster and will allow you to trust the ski in all conditions from slow groomers, to high speed ice, to steep, technical, chundery terrain. It's wide, powder shaped tip gives you effortless float up to 12" of fresh snow and the ability to pivot on a dime in tight trees. Learn more > jskis.com/collections/masterblaster
The biggest thing you'd notice vs the Enforcer is the ability to carve turns according to your skiing style, whereas the Enforce tends to lock you into a singular radius carve, the multi-radii of the MB lets you choose your arc based on the terrain you're on. Because the Enforce is slightly that will give it more float in powder, but the longer rocker of the MB tends to level this playing field very well and you won't notice a difference in deep snow performance.
Compared to the specs/dimensions of the Camox, that ski and the MB are fairly similar both with a rocker-camber-rocker profile and similar turning radius. The biggest difference is the use of a poplar core in the Camox vs the maple core with titanal construction of the MB. My concern with a light poplar core would be the ability to hold it's own in steeper, faster terrain, where the MB really uses its construction to help the skier manage more advanced lines. Since we sell completely direct to consumer from our factory we're able to build skis using the absolute best processes and materials possible, ensuring you get a better ski for the same money!
We also offer a 100% money back guarantee so you can try the skis on your own time, and if you're not completely stoked send 'em back for a difference ski or full refund. As always feel free to hit us up directly: info@jskis.com or (802) 585-1098