I maybe wrong, however isn't the Beartooth, Wolf, and Optima/Optima Pro basically the same gun? If so what are the differences? If not then they look very, very much a like except for a few stock changes. How do they compare to each other? Is there any 'blowback'? I'm also looking at a NEF Sidekick. How does that compare to the other 3? Just want a SAFE, reliable, well made yet no frills BP. Thanks in advance.