Country Story is more like Farmville would be if it had actual depth... but then it becomes blatently obvious that the idea is simply a rip-off of "Harvest Moon".
That's not to say Farmville isn't fun, it is, but I find Country Story a little deeper.
Most Zynga games appear to be rip-offs. Farmville was ripped from Farm Town, and he recent Cafe world is almost a frame by frame copy of Playfish's Restaurant City (in terms of general gameplay and graphics). Mafia Wars came from SGN and Pirates and the Space Genre games both share the same backend as Mafia Wars.
That's not to say Farmville isn't fun, it is, but I find Country Story a little deeper.