whats the difference between these sticks?

CCM - OCTO GUN 50 GRIP STICK and a CCM - OCTO GUN 30 STICK ?? and does anyone have any comments about them? would you recommend them or not?

The 50 - weighs less, cost more, has a more rubbery stickey feel to it.
The 30 - weighs more, cost less, does not have the grip coating (unless you get the grip stick).