Finally, get a pair of surgical gloves and cut the finger ends (so you have touch unimpaired). Now play wearing a glove on the right hand After a few minutes of practise, take the glove off and you will see that the right hand (the one with the glove) is now more accented.
If you play both hands at exactly the same volume, the right hand will naturally come out because the high register is heard more distinctly. The usual problem is not to make the right hand sound louder, but to make the left hand sound louder.