Question about Material Pairs

I have a question about material pairs. if i have the pair WOOD RUBBER is equals to have the pair RUBBER WOOD?

I need a rubber body bounce when it touchs a wooden one, but when a body of wood touchs a rubber body the wood should not bounce like rubber.

Can i have two material pairs (WOOD-RUBBER, RUBBER-WOOD) with differents values for elasticity and friction?

I will appreciate any help you can give me.

I'm not really sure, but I think you could take care of who hits who in the callback and apply different forces.

As far as i know, You can do this, and actually you should. But like tod said, you should be able to handle which is which from the callback.

Ok. thank you tod and SFCBias.