4Minutes

The time travel aspect of both series makes them very interesting. While one onky travel 4 minutes in time and the other for weeks at a time, the aspect of time traveling is very intriguing

Both are Thai BL dramas that involve murder mystery. Goddess Bless You from Death leans more to supernatural horror while 4Minutes leans more to sci-fi.

Both series shows a special power of seeing into the future. In 4 minutes, he is awake while in Head 2 Head, he dreams of what can happen in the future

Both are Thai BL dramas with a psychological horror/mystery theme, with 4Minutes having a more sci-fi edge and Happy Ending a more trippy, dream-like feel. There is male-male romance in both shows, although both shows are more story focused than romance focused.

Similar opening episode - a mystery and a curse/supernatural plot device/driver. Good cast. Interesting hook.

A main difference though: Leap Day isn't a BL (or it doesn't look to be, from episode 1). So don't expect any (maybe bromance).

Similarities: 4Minutes is a ThaiBL that centers around time travel and alternate time lines. In 4Minutes the main character is able to see 4 minutes into the future and can change the outcome of events. The two male leads also have an enemies to lovers relationship.
Differences: 4Minutes is an nsfw series that depicts murder, sa, child abuse, trauma, and shows nudity.