I always buy 6 point hex sockets. Can't see any advantage to 12 point other than it will fit on the nut/bolt head quicker.
I sort through boxes of sockets and tools at car boot sales. You'd be amazed what gems turn up at those places for bargain prices if you've got the patience to sift around crouched down on the floor.
A lot of people clearing a garage out don't know the difference between Snap On and Super Savers own brand