I'm a big fan of RFB as well! Traditionaly, RFB has always been geared more towards the more "realistic" experience. If you read the descriptions of each mod on the first pages of their respective threads, you could get an idea of what each has to offer.
Both these mods are great, and both have come a long way from what they were in their beginings, in that they now include other mod packages such as ROW, NSM, RSRD, and others, to really add to the experience!
