Agreed, either of the GL's would be nice to have. It boils down to levels of risk and what kind of game we want to play. Here's how I see the two options panning out:
1) The Library gets us nothing in the short turn. We don't meet anyone for a long time. Temples and libraries are built first, then markets, once we learn currency. We build up culture fast and don't spend too much on research because we'll get it all for free one day. In the meantime, we have a boring builder game with an occasional bit of excitement when one of our boats sinks. Then one day we meet the rest of the world and BAM we are cought up in technology.
2) The Lighhouse also gets us nothing in the short term, except our galleys have a better chance of survising on the open seas. So chances are we meet other civs sooner and start trading. So far so good. Here's where it gets tricky. What do we have to trade? No luxuries, and no resources we can see yet. We might have a monopoly on coal and oil. We might have nothing at all. What do we do if we have no tradeable commodities or technologies? We're too far to hurt anyone, so extortion is out of the question. In effect, we run into the world all excited to join the party, and... the world is not impressed.
So, actually, meeting other civs sooner is not that big of a deal if we have nothing to gain by meeting them. If you think about it that way, the Library starts to look like a more attractive option. The only thing making the Lighthouse interesting are the harbors that come with the same tech.
1) The Library gets us nothing in the short turn. We don't meet anyone for a long time. Temples and libraries are built first, then markets, once we learn currency. We build up culture fast and don't spend too much on research because we'll get it all for free one day. In the meantime, we have a boring builder game with an occasional bit of excitement when one of our boats sinks. Then one day we meet the rest of the world and BAM we are cought up in technology.
2) The Lighhouse also gets us nothing in the short term, except our galleys have a better chance of survising on the open seas. So chances are we meet other civs sooner and start trading. So far so good. Here's where it gets tricky. What do we have to trade? No luxuries, and no resources we can see yet. We might have a monopoly on coal and oil. We might have nothing at all. What do we do if we have no tradeable commodities or technologies? We're too far to hurt anyone, so extortion is out of the question. In effect, we run into the world all excited to join the party, and... the world is not impressed.
So, actually, meeting other civs sooner is not that big of a deal if we have nothing to gain by meeting them. If you think about it that way, the Library starts to look like a more attractive option. The only thing making the Lighthouse interesting are the harbors that come with the same tech.