Is there a difference between the two other than one has the handles? I need to get one or both but I hate the tubing with soft handles that shift (all the recent ones I've seen). A long time ago I had one with molded plastic handles but cannot seem to find another like it. My problem with the new type is it's hard for me to keep my wrists straight; maybe they are weak. Anyway I figure I need one of the 6ft stretch bands like the firewalkers (which it seems cathe is out of at the moment) would that be just as effective as the tubing or do I need both?