an open diff will transfer all the power to the wheel the least traction
engine braking means when you come into a corner and slap it down a gear and the revs go up but you are off the gas and slowing down
your car might have a torsen lsd . they are a whole other bucket of fish
1 1.5 and 2 way all refer to machanical lsd,s
open lsd is no "way"
clutch type lsd (as per most nissans ) work both ways but dont lock as hard as mechanical
torsen (torque sensing) lsd doesn not have ways either