There's a reason you aren't seeing the same cam being named unanimously. There are a small number of cams that are being used by builders and the engines they build produce the same amount of power. These guys aren't just picking out parts and assembling them right out of the box. If they're using Cam X successfully it's because it works best with the way they shape heads and carbs they build. It's a package. They have years of air flow research contributing to the way they build stuff. Cam X motors make X amount of power but it's also because of their carb work and cylinder heads. Another guy might use Cam Y but it makes the same power as the X because of the way he does his carbs and heads. Just different paths leading to the same goal.