Seconding this, if you dropped OpenTTD because of the simplistic passenger/cargo routing (i.e. take any cargo to any place and pay is only based on how far you took it) then definitely give the CargoDist option a try.
Every passenger (or mail or manufactured good) has a unique destination in your system that you need to get it to. They are roughly balanced based on demand (two stations in large cities will generate a lot of traffic between them, but a small town will only generate a small amount of traffic to and from a large city). It makes the transport routing game way more interesting and more like the routing of passengers in more traditional Sim City type games.
Every passenger (or mail or manufactured good) has a unique destination in your system that you need to get it to. They are roughly balanced based on demand (two stations in large cities will generate a lot of traffic between them, but a small town will only generate a small amount of traffic to and from a large city). It makes the transport routing game way more interesting and more like the routing of passengers in more traditional Sim City type games.