Which is the better reel, especially for preventing backlashes?

I own both of these reels.

As for the dual braking differences?  The actual mechanisms are identical.  I can't really say one reel outshines the other in preventing backlashes.  These reels are literally thumbs free casting.  Set up right, my thumb is on the reel just before I release the spool for the cast and again when I want the lure to stop.  I rarely have to thumb it otherwise and that includes casting into the wind.  Some lighter baits might require some thumbing during the cast especially if it's windy.

The biggest difference between the 2 is weight.  The JM sig reel weighs over an ounce more than the Patriarch and the overall profile of the JM reel is taller and a little wider (as compared to a Patriarch LP reel).

and on that basis i buy the patriarch!!!