I think that's best discussed in the games' thread or one of those dedicated to era games in general (e.g.
here), since it would be seriously off-topic in this thread.
Suffice to say that imho both eraTohoK and eraTohoTW are pretty different from LT. eraTohoK is a kingdom-conquering strategy game (similar to e.g. Sengoku Rance), while eraTohoTW is an open world sandbox dating sim where the MC has a timestop power.
Not sure why
Gierka thinks that LT's dev ripped off eraTohoK, as the games are very different at their core.