Here is the long and short of it:

Rod action will differer from blank to blank and company to company. The reason being is that all of them utilize different proprietary blends when creating their blank composits. A St. Croix blank in SCIII in a 6'6" Light weight fast action will have a much different feel than a fenwick elite tech 6'6" rod in the exact same weight and action.

The best advice is to go to a store that has a very large selection of rods and put them in your hands. Each person is different with what they like. Some guys prefer a stiff rod for jigging because they do not like the bounce in the rod, others prefer a limber rod with a soft backbone. Everyone is different just like every rod is different. Take them off the rack, put them side by side, wiggle them, jig them, and feel them. Take a 6 foot piece of mono and a light weight jig with you and tie it to the tip. Feel what the rod does in your hands. Best tip I could give you!

I build my own rods as well so I can get the exact size feel, shape, length and so on of the rods I use. They are "purpose" driven. If I build a rod for jigging, it will NOT excell as a rod for pitching jigs.