Comparing "Seoul" to "Yongin" is not very good in the grand scheme of things. Seoul has a metro area which doesn't include Yongin, but it would be unwise to con

Comparing "Seoul" to "Yongin" is not very good in the grand scheme of things. Seoul has a metro area which doesn't include Yongin, but it would be unwise to consider Yongin outside of Seoul since it's basically a satellite city connected to Seoul. The name for this is Gyeongi but that's another thing. Most of Gyeongi is still basically Seoul in natural form. The same way Greater London is part of London but separate from the City of London. Because Seoul is so big, it's more akin to calling Yongin a "suburb" of Seoul, and Yongin has its own suburbs. Seoul and Yongin compared area wise would be the worst since you have to first set the definition of Seoul. Seoul covers Yongin in most natural definitions of a city, but in reality the Seoul inner region is its own and is obviously tiny. It's better to call it Seoul metro area (Seoul Capital Area). Yongin is an old city, it doesn't have better infrastructure planning at all, but it doesn't have a lot of super old infrastructure which is great for future planning. Be it due to budget or just slow crawl of improvement, who knows. It's desirable because it has everything you need, now including Costco, IKEA, etc. and it's got land. That's all. Your last answer is weird. There's nothing better about Yongin than living in Seoul, except for possibly commutes. It's all a matter of perspective and negatives. I don't think either are objectively better but living in Seoul is definitely more sought after and "higher" status.