Yes, I would like to point out that Plymouth will stabilize at the highest morale level on any game setting, provided they have satisfied all colony management requirements, and there is no negative event morale bringing them down. Eden stabalizes one level lower on hard. The only way to get to the highest morale level with eden, is by event morale bonuses, which the consumer goods factory provides. That extra morale level can make quite a difference in population over the medium-long run if I remember correctly.
Things like recreation centers can just not be researched and they will not affect colony morale, so Plymouth has a pretty clear morale advantage for early game when playing on hard. The consumer goods factory is the only morale stucture that you can think of as having to pay a morale penalty for not having researched it.