Why they are similar:
Famous male lead
FL suffering
Both ML has kinda disease (idk if we can call them disease) but of different types
Sleeping arrangements
Unlikely relationship
While my neighbour can't sleep is more of a cute type kakafukaka is more dark

If you liked this, you'll surely like the other over ...bcz:
-Same ML
-Unrequited love
- no love, only physical relationship
-ended up falling for each other
- explain stories from all the side
-and more