CDG (North of Paris) is on the railway that joins Brussels, Paris, Rennes, Tours, Bordeaux and a number of other major places in France. ORY has a connection with Paris suburban railway network, no direct access to one distance train.
Right. ORY is very close to Massy TGV (2 stops or so on the suburban train) which goes to the west (Rennes) and south (not sur if Bordeaux or Lyon or both).
