[B.A.T.M.A.N.] Node with two wireless interfaces - to bridge them or not?

I have one node that has two wireless interfaces. I was thinking to increase somewhat the multi-hop bandwidth loss and what is the best way of doing that. Currently I have ath0 with two nodes on there and ath1 with another two nodes but I'm not bridging those two interfaces. The thing is, they are on the same subnet so is there any point in keeping them "separate", any performance advantage, or should I just make a bridge and add the two ath's to it and just have a single IP and run batman on that one bridge or leave it as it is, with two IPs from the same subnet and run batman ath0 /w ath1 /w as I do currently?

Pele