well what i have seen is that beamng drive has real physics and great graphics. but the game lags alot for some people. rigs of rods has great detail in some maps and hes ok physics. i had a bad computer and ran both. beamng was very laggy and no matter how low my graphics where the game still lagged alot. rigs of rods was ok a first. not alot of lag to it but all i had to do is turn my graphics down. after that the game ran very well. the only thing that lagged was having 4 or more trucks in the game and people spawning in multiplayer. even with a bad computer ror online still worked fine.
so im going with rigs of rods on this one