The C-41RA LORR replenisher and regular non RA developer replenisher are different. According to Kodak tech pub, the RA replenisher has twice the replenishing capacity than regular non RA replenisher. In simple words, if it takes 10 ml for a regular developer replenisher to replenish it will only need 5 ml of RA version of the replenisher for a same volume of film processed. For this reason I believe it is the best for Jobo rotary processing. I don't know what makes it twice the capacity. Maybe after adding starter and make it a working developer it becomes a same developer with no extra strength.