it is definitely looks more detailed then BRS...but besides the obvious part of having more physio, biochem, micro, etc (perfectly integrated) the format is much more spread out then BRS. To get all the small details and explainations of mechanism, lab tests, etc you really have to read every word of every sentence in BRS path as they are not really laid out for you as in RR. There is also the issue of full sentence in BRS vs. pure outline in RR, and inclusion of lots of charts and picture in RR.
I almost feel like after an initial review of physio, biochem and micro....that I'll just use RR (and of course First Aid) to integrate everything and only look at other specific sources if I get somethign wrong on a practice test that I don't explicitely find in RR or FA