I don't think they are the same artist because for me when comparing the two art styles they are similar but you can definitely spot the differences (like with the line art, shading, difference in detail like when drawing the hair, the way the blushing is drawn for the two manhwas is different, etc). I think it's just a coincidence they look pretty similar (which is rare but does happen). But I guess it doesn't take away the possibility they could have the same artist but the author/artist for "dawn of the dragon" is the same person so theres a small chance they would have the time to work on another popular manwha.
This artist is now doing "I raised my fiance with money"