Both have a mix of freight and passenger services. MSB has some heavier freight trains which are using banking loco´s. There´s a mix of fast and heavy freight, some shorted passenger services and some longer. It has the moving cars feature and the Destination boards RSN has aswell freight and passengers. Freight trains are shorter but you have some services where you uncouple / couple / shunt around some wagons before heading off. I like both, really hard to pick just one