While the storylines are very different, I felt that the two male leads (Seo In Guk, in Shopping King Louis, and Choi Woo Shik, in Ho Goo's Love) were both innocent and lovable in their own ways.
These two dramas are slightly reminiscent of one another simply because of the happy theme and the sweet, light-hearted romance. Their storylines differ greatly, however the main characters I felt were a little similar. The male leads are both super romantics and as Louie would say, "perfect", boyfriend material. As for the leading ladies they're both characters i would strive to be more like--warm-hearted, caring and innocent.