AnotherGame is a mod for ToE 3.1.

I'll say it again: there's no difference in how uniqueness is defined.

You just don't understand.

I gave you specific examples from in-game situations. The choice is between a town hall or developing a gold mine. Naturally, the town hall, because it's cheaper. The choice is between a warehouse or developing a resource mine for the same resource. Naturally, the warehouse, because it's cheaper. Do you understand what I'm getting at? With your prices, you're eliminating choices.

So, the other 20 units of wood are just for nothing?

After the first week, an Elf can easily manage with normal wood production, so there's no need to overpay for it.

Added 6 minutes later
I calculated that an Elf needs 12 more wood to fully build everything compared to, for example, a Human Castle. And wood isn't exactly scarce there. So, is it worth paying 7500 for those 12 units of wood?