I'm struggling a little to follow your question; can I recommend you re-read your posts after typing them out to make sure they flow properly?
There are three endings to the level; an ending for 'normal' mode (which is hard-difficulty), an ending for 'hard' mode (which is super-hard difficulty) and a bonus ending which is slightly whimsical and can be found in both normal and hard modes. I've been told that it's not too difficult to find.
The hard mode ending gives... a little more information about the story, in a kind of tongue-in-cheek way (it's sort of a reference to the bonus ending of 'Coldmist Mountain'). It also has a little extra reward.