Ask 5 people, get 5 different answers, lol.
Never been to CBR--we love CSR--have now been twice, and my 6 year old cannot wait to go back there. That said...we stayed in Ranchos both times and love the walk in the quiet morning to the Pepper Market before hitting the parks. Ranchos was also close to two bus stops--and I don't know about the CBR busses, but CSR busses do not share with another resort, rarely crowded never waited more than 10 min for a bus, only stood once on the way home after fireworks.
We saw a few conventioneers, but were never bothered by them. In fact, we liked it that they stayed in their conventions all day and freed up the busses and other facilities there. We didn't hang out at night so can't speak to their behavior then, but I will say that I arrived by myself (met my family, they travelled earlier in the day) at the resort near 1 am, walked by myself from Lobby to Ranchos with caution of course (and my hand on my cell phone), and I didn't run into a soul.
Most of all we just love the peace of CSR after a loud day @ the parks.
Good luck with your decision.