Left or Right caliper, is there a difference?

[xp190]

Hi guys

I was wondering if someone could answer this for me. I have two rear left calipers, and only one rear right caliper. I was wondering if it would make any difference if I put the extra left caliper on the right side.

From what I can see, the only difference would be the bleerder screw, and I guess this makes a difference since it would be sort of difficult to get all the air out when the screw is on the bottom, but is that the only reason or is there something more to it then that?

TIA

xp