i have no experience backing this up, but what ive heard is that the adjustable nozzle will basically only benefit the hard core racer, were fractions of seconds count big time. it does look cool having the anodized nozzle in there, but i wouldnt spend extra money just for that. as for the diverter being differant between the hydrolic and manual, the only thing i thought was differant is the mounting arm. i could be wrong. most likely.