Which is more difficult to sing, folk songs or pop songs?

Personally, I think it is definitely a popular song worth singing. Have certain knowledge and achievements in vocal music, and have received bel canto training. As far as I know, national singing requires a lot of singers, both in skill and sense of melody. Want to sing folk songs, in addition to personal talent, but also have a high musical literacy. As for pop songs, to tell the truth, most people are good at singing, but if they want to sing seamlessly, they need a certain foundation. You can do some skill training. If you are a beginner or a layman, sign up for a class, but it is best not to sign up for a class specializing in pop songs, so it is difficult for you to learn real skills and professional knowledge.