Yeah, it seems more like a fun mental exercise that went slightly out of hand than an attempt at a serious scientific analysis (which is perfectly fine and the latter wouldn’t really be possible anyway given the context).

However I have to agree on this point. While Antioch might make sense for Minas Tirith. Albeit to quite a limited extent since it was a sea port and a major trade center being one of the last stops on the silk road.. While Minas Tirith was primarily a fortress which was probably not self sustainable on its own without food, wealth and population transfers from the other provinces in Gondor (so more like Constantinople just with massively less trade and built on the side of a mountain).

Edoras seems like a completely different type of settlement in almost every conceivable way and should probably be compared to Eastern or Central European towns.