I think, automatic transmission in ROR is more convenient. I mean, when you stop vehicle, in BeamNG DRIVE reverse gear switch automatically, in ROR you should manually choose reverse gear. Sometimes it's annoying when you want to stop on little speed, the rear gear often switch.
Already asked http://www.beamng.com/threads/1398-Keyboard-Control-suggestion gabester also replied saying they will implement "P R N D 1 2" transmission system.