In general I found the Chinese lyrics far richer in meaning than the Japanese, mainly because the Chinese language, being monosyllabic, can fit many more words into a given line of song.
大體而言，我認為中文歌的意境總是較為深遠，因為中文是一種單音節的語言，同樣長度的句子，中文所能涵蓋的文字總是較多。