For now, the tags have been merged.
There were only two questions using the-legend-of-heroes and both were about Trails in the Sky, so I've gone ahead and merged them to loh-trails-in-the-sky. However, given that 'Legend of Heroes' could refer to any of the LoH games in the series I opted not to create a synonym today.
I am of the opinion the older question should be closed as a duplicate of the newer one. No merge necessary.
But wait! Why are we closing a question as a dupe of a question that didn't exist when it was asked!
As you've pointed out, the newer one is better. If we had caught that it was a dupe before so much information was put there, we could've closed ...
Given the lack of a community agreement to do so (as evinced by both questions still being open), I think we can consider this declined.
This answer is here to stop Community from ever bumping this question again. Upvote it please.