In both dramas the female lead started out as self centered spoiled rich ladies but due to some series of events wherein they were forced to dealt with, they developed maturity and learned to be think more of others than themselves.
Both include comedy scenes especially when the female leads were struggling after being placed in a new environment/ situation that they were not prepared for.

Both dramas have a male lead that is almost perfect and too good to be true and paired with a prickly self centered career oriented female lead.
If you like the good guy who wear their hearts on their sleeves instead of the usual bad guy lead, then both these dramas is for you. Just be prepared to get you heart broken as your heart hurts for the male leads as their love and sacrifices for the female lead gets overlooked time and time again.

If you like light weight cute rom com, you would enjoy both dramas. Also if you like dramas about pretending and the hi-jinx associated with keeping the lie, then you would like both dramas

Both dramas have supernatural aspect mixed with romance and comedy.

if you like dramas with hi-jinx of bickering leads, both would be a good rom-com to watch

if you like cute noona romance, then watch these movie and drama

Both dramas involves a male lead who is considered a very good catch and sought after by women but was never interested in women. They are mostly focused on their career.
If you like cold uptight male leads who eventually transformed in a softie when they finally fell in love , then these 2 stories are for you.

If you think sending love messages that you cant speak of to someone you love and hoping that someday destiny will eventually deliver it to that love one is poignant and romantic...then you will find this 2 movies touching and heartwarming

If you like modern day Cinderella stories or Rich guy and poor girl type of conflicts, then these 2 dramas will be a good watch.

The male leads also in both series displayed a great transformation in their characters when they finally met their first love. They both have went through a tremendous length to protect the woman they love and solve hindrances brought about by the differences in social status with the woman they love.

these dramas have a different setting, both dramas portrays struggles brought by greed and hunger for power. The villains in both dramas also are very good actors. They make you hate the character so well.

if you like suspense dramas that deals with plots about greed and corruption then you would like both of these dramas. Punch is more heavy to watch while Healer had the romance angle in its story which makes it a lighter watch as compared to punch.

Kim Rae Won and the child actress who played the daughter were really good in portraying their roles.

Both dramas involve leads that have their lives intertwined by what happened in the past. Both had male leads that have secrets kept from the female lead. The male leads falls for the female leads despite not so remarkable or favorable impression of the female lead at first.

Both secrets from the past are gradually revealed providing new twist. Although, hotel kings plot twist seemed more long and winding.
The male lead will do anything to protect the female lead

The best part of both dramas is the chemistry between the actors who played the OTP .