Don t think so The CRJ 700 and CRJ 900 are definitely similar enough to be the same article same engines same wing and are really no different than say a Boeing 737 700 and 800 or an A319 and A320 which are simply discussed as variants to a main article The CRJ 1000 is a bigger change but BA markets them as a family and until the CRJ 1000 has sufficient market penetration of its own it might as well stay here i think