Jo In Sung's brother: Look-A-Likes?

Actor Jo In Sung's younger brother, Jo Woo Sung, has been getting lots of attention due to their uncanny resemblance. After Jo Woo Sung posted his pictures on his mini-homepage, people have been flooding his pictures all over the internet. Some Netizens are saying that the two can pass off as twins. Other Netizens are saying, "They're like any other siblings, they are similar in some aspects, but overall no." He has also gotten comments about being "good-looking enough to model". Along with his good-looking face, pictures of his bare body have also gotten the attention of many female fans. Will the Jo brothers become another one of many famous siblings? Is it just me or does he resemble Mario from the Mario Brothers in the following picture?