my opinion - FWIW - some plastics definitely are better than others. Quality of the plastic, action in the water, colours and scent. Makes alot of difference what weight jig head you use and how well you rig it too. Doesn't necessarily mean that the more expensive ones are the best.
With lure fishing in general, you have to have confidence in what you are using. If you don't, you are always chopping and changing. INHO, you are better off spending a bit more money and making sure than what you buy is the real deal and then giving it a proper workout before you change lures.
Jeremy