It depends on what "statistics" you are comparing. If it is purely energy or velocity between different calibers or bullets of the same caliber, then I look at bullet weight. Only if I were comparing trajectory between two bullets of the same caliber or identical bullet weights in different calibers would I care much about the BC.
In my practical experience, I would have to second Graybeard's observations. Velocity and modest differences in energy are both mightily overrated things. Unless your bullet is traveling too slow for the job (which is a lot slower than most people realize), IMO you gain a lot more in bullet integrity and penetration with low velocity than you gain with "shock value" at higher velocities. In real hunting conditions for medium to large game at ranges under 250 yards, the difference in trajectory at slower vs. faster velocities is insignificant within a given bullet weight range, and the BC difference between bullets is an exercise in splitting hairs unless you are comparing a flat-nose to an SST, or something equally drastic. Only at long ranges and/or with small targets would BC likely have much influence on what bullet I would choose for any application.
In fact, all my hunting loads are now formulated based on this process: choose the bullet weight and construction for best performance on game at moderate to low velocity, determine the max range for my shots, determine the low end range of velocity/energy I want for that game, set that figure at the maximum range, work backwards to the muzzle to determine my desired muzzle velocity, and load for that velocity. In that way I get a load that has minimal blast and recoil and a bullet that travels at the SLOWEST desirable velocity through the range I will be shooting. Trajectory is then measured and sight-in and holdover values are determined accordingly. I also seldom come close to the max loads listed in the reloading manuals, and find my accuracy to well exceed the demands of my hunting.
