both dramas about a high school teens who are investigating mysteries surrounding their twin, after an incident. both leads were separated from their twin as children. revenge for others is more violent then who are you, at least as far as I have watched
Both have romantic relationship between an older women and a younger man. In ROTCH it is a master/apprentice relationships, The relationships in sword dynasty has a similar dynamic, male lead calls female aunt, its the same in ROTCH. When I was watching ROTCH I kept thinking of sword dynasty.
The main reason I recommend this is that both dramas are good wuxia and the have some shared themes. the overall arc of the male leads are similar in my opinion. if you are looking for another good wuxia, then look no further.
Both dramas are wuxia, though set in a different times. When I began watching SSOFV it made me think of the eight. I find that the leads and supporting cast have a similar dynamic. Both dramas are fairly dark and the male lead does suffer a lot. Both male leads seek justice and have a strong sense of right and wrong. If you liked one then you will like the other one.
Both dramas are wuxia, personally I enjoyed both of these dramas. I would say that Heroes is darker then Love a Lifetime, but I think if you enjoyed one then you will enjoy the other.