rexrainbow, the plugin that you have mentioned only generates a map and only generates a one type of map. On the other hand, Roguelike plugin allows you to
1) generate different types of maps,
2) to do the FOV and pathfinding calculations (discrete in nature and, thus, different from C2 build in plugins for respective functions)
3) populate rooms, since it gives you the reference to rooms' coordinates,
4) place doors, since it gives you reference to doors' coordinates
I hope you see the difference