How to distinguish Song lyrics and Yuan compositions from their titles?

Some compositions have the same name as the words, such as Yi Qin'e and Nian Nu Jiao

Some have the same name as the words, such as Pounding Lian Zi and Man Ting Fang

Some have different names than the words, such as Shanshan Sheep and Dang Dang Ling

The compositions are mostly monotonous, unlike the words which have double tones, triple tones, and quadruple tones, and the differences between the words and the compositions are mainly in the rhymes, the four tones, and the use of pro-characters.

Song lyrics are based on the tunes of the Central Plains,

Yuanqu is derived from the tunes of the northern steppe peoples, which is why Yuanqu is also known as the Northern Quartet.

In fact, but from the word brand tune is difficult Song lyrics and Yuanqu, look at the content, the word is more elegant, the tune is more popular