The thing I noticed most when looking for a bow last year is that the hump I had always heard about was on the milder cams more more so than the speed cams. Right or wrong this is how I perceive it. As you draw the bow the cams rotate and get harder to draw. The mild bows pull easy in the beginning and then ramp up towards the end. This is the hump as I understand it. The speed cams ramp up very quickly and then stay steady throughout the rest of the draw. The following is just an example, I have never put them both on a draw board with scale attached to plot draw force curves. With both bows set to 60 pound I may draw my son's Pantera back 8 inches before I get to the full 60 pound draw where my Firecat 400 may be at 60 pounds at only 4 inches. Since the speed cams are kept under higher tension longer they sling the arrow faster. Clear as mud?
That being said I was totally shocked when I compared my FC400 to my brother's BT Invasion. His cams look much more aggressive than mine but his was much easier, or at least seemed much easier to draw. So I do have to agree that you can't judge a book by it's cover.