rod, Spinning got me spinning

[usngsm2]

What is the difference in the action of a conventional spinning rod and a drop shot spinning rod of the same weight and action?

I was looking at tacklewarehouse.com, in the shimano crucial spinning rod section. 6'8" med rod. What is the difference in cast worm rods and spinning? Would it be fair to say other than casting they are about the same? What would I use the 7'2" M ex-fast spinning rod for?
Does anyone use a "tenn" style spinning rod and what for?

I have a med spinning set up and was thinking about a 6'8-9" rod for like wacky and skips but I do the same on my now med set-up on with an Okuma avenger 30 and have had no problems. What are ALL your spinning set ups and there applicaitons?

Thanks..