This might be far-fecthed similarity but both have characters working in the entertainment industry and I see something similar in Dokko Jin and Do Hyun's characters.

Both dramas are comedies about marrying into a traditional Japanese family and getting elderly's approval and acceptance. Women in the dramas are career women.

Young adults dating. Has rich guy, poor girl theme. Hate turns into love. The Chinese drama is a bit more funnier comedy in the beginning but turns into a serious drama later. Love both very much. Hey, and the Korean drama's mail lead acts in a few Chinese dramas so that can be a connecting click between these dramas. >_< Anyway, feel good dramas I'd say.

Dramas about young adults with career and dating issues or just youngsters living life figuring out their future plans while hanging out with friends. Both dramas have somehow stand out from the rest and out of recent dramas these are the ones I've enjoyed watching. Also in both dramas the charachters (cute punk and curly haired woman) look a bit similar from the outside and perhaps behaviour too. I think both are realistic human dramas meaning no silly comedy or supernatural stuff.

Male friends living and working together to succeed in life. Both dramas have normal cozy life which you can relate to. Riders is dealing with many typical Korean and probably many other countries' issues like how to find a good job and partner when there is pressure from parents and money trouble. Dramas about friendship and things in life which are truly important and meaningful. These dramas are not that serious as I made them sound like, there are many funny scenes as well.

Only based on two eps of FFI I got the picture of two persons trapped in one body which is similar to Who Are You? And one of the sides of one person is mean and the other side is nice.

Actually these two dramas were compared in another place. Both have city people coming to farm as an idea to become rich fast after they inherited the farm from relatives. Characters are somewhat similar, at first annoying bratts but then very warm hearted. Modern Farmer is very humorous while Vineyard Man is a bit more emotional. Good family and community related stories. Vineyard Man has a really good and sweet ending.