For me the great bonus of rFactor is the circuits. Longford, Tasmania is a dream circuit and the opportunity to "drive" it is just fabulous, I have spent hours researching it on Google Earth, much is now by-passed or, like the two bridges, gone forever, so sad. Also Sudschliefe is a rare gem as is Nassau.
Add in the rFactor hill and mountain climbs like Stelvio, Mont Ventoux and Pikes Peak and with all those different cars available rFactor is a match for Grand Prix Legends for enjoyment.