both historical (take place in the 1980s)
both based off of a true story.
both melodrama's witch means they are both sad in some way, most likely tearjerkers.

1 both takes place in a foreign
2 both take place at snowy settings
3 both open ending
4 both have a sad love

so the ml has the same personality and practically the same life, minus the f4 part, he's arrogant and rich and finds himself falling for a poor girl that stands up to his bullying, I feel like this is a compilation.

it's the same story and plot, this is an adaptation it just didn't get permission so it wasn't counted as an adaptation