If you go to the NAP web site the newest version of the 2" speed hunter is made of a more durable material. I have not tried them yet but I have tried the current version and they are plenty durable. The 4" quik spins do wave up if they come in contact with anything in flight.

But the cost is one thing to consider too - they are more expensive than the blazer vanes. They both work just fine with controlling a broadhead.