Ergon vs cheap generic


I picked up my Yamaha cross core a couple days ago and found I need different grips in order to relieve the pain and numbness in my hands. I am going to order a set of ergonomic grips with horns, but have found a great difference in price of the generic ones vs the Ergon gp5. I definitely want something with the horns so I have different places to grip. Any recommendations on the difference in generic vs Ergon brand grips?