The LRB is laced with undercuts & sieves, and is prone to getting strainers & man-made junk in it. At moderate to high levels, a number of hydraulics develop that can easily seperate boat & paddler, and the run is much more continuous.
Yes, it will prepare you for the Green, but from a safety standpoint it deserves AT LEAST as much respect. Make sure you have the skills, go with people who know it well, scout the big drops, and choose a kind intro level.

