oh well both are panned 100% to each side. You should just go in on your computer sound settings and swap it between right and left :)
I've never had a headphone or pc speakers that sounded a 100% the same on both sides
also the angle makes difference and the perception of each ear is not as balanced as we would believe
isolating the same track on each side would still sound slightly different to me :?
can't you post separate doubled tracks?