In that price range, I don't have a clue.
How sensitive rod A is over rod B depends more on the individual than the actual rod. Rod A could be sensitive in my hands, yet you may not feel anything with it.
My hands are very sensitive, either geneticaly or learned, so I can get away with using a less sensitive rod.
Also, knowing what certain objects feel like (grass, rock, wood, shopping carts, etc) when bumped into will help in deciding how to choose how much "sensitivity " you need in a rod.
Generaly speaking, the more money you spend on a rod, the more sensitive. That being said, not all expensive rods (high end) rods are any more sensitive than $40-$100 rods.
If you want to sharpen youe sensitivity skills then practice at night.