Both drams have revenge plots that take years.
Both are suspenseful and exciting watches
Reborn rich has a ML seeking revenge while in The Glory it’s the FL

Both deal with love and grief set in the past. Although, AOS has magic both show deal with spirits. Both have serious notes as well moments of sadness. The shows also has have an action component as well. I am currently watching them both and they have a similar vibe.

It's similar in it follow 2 boys who were friends as kids. They are also separated for a period of time albeit for a different reason.

Both have the main leads as students
Both have characters who are make reference to the Comm faculty for acting

Both are more slow burn BLs that dive deep into the emotional aspects and less on the physical.