In both, there are complicated family problems, drama, and the stepmother has a strange hate/love with her step-son/daughter

The two are about a famous royal concubine who was known for her beauty and her cruelty

The two are about beautiful women fighting for the king's attention, in the midst of a war. Besides, in the two, the heroine has temper, and gives up her first love by ambition/revenge

Die Sterntaler and Spring Day are both based on the same drama, Heaven's Coins. Both are very different but very good

Again, Die Sterntaler is the taiwanese adaptation of Heaven's Coins. But personnaly, the taiwanese actress for Aya is much better that the japanese one

It's the korean adaptation of Heaven's Coins. But honestly, I think the korean story is deeper

Both are about an intense love triangle with two hotties fighting for a beautiful girl

Both have Huang Xiao Ming in their main and both are about men (two in SD) who are obsessed about a beautiful woman. Except that in SD, she isn't a complete idiot