Same:
First, literature advocates the same idea, and all advocate that poetry should reflect society, politics and people's livelihood, which promotes the creation of allegorical poems. Such as Bai Juyi's "Light Fat" and "Selling Charcoal Weng"; Yuan Zhen's Shang Yang White-haired Man fully exposed the political darkness and people's sufferings at that time, and showed a strong sense of justice and a sense of responsibility to society, politics and people.
Second, the themes and contents of some poems are similar. Such as fable poems and erotic poems.
Third, artistic realism and vulgarity.
Different:
First, Yuan Zhen's new Yuefu borrowed ancient poems, which was not as firm and thorough as Bai Juyi's.
Second, the breadth and depth of the content and the vividness of the characters are not as good as those of Bai Juyi.
Thirdly, Bai Juyi is most interested in fable poems, but the most successful ones are sentimental poems, especially Song of Eternal Sorrow and Pipi Xing. Yuan Zhen's creative achievements are reflected in his mourning poems such as "The Waist of Things", "Palace", "Leaving Thoughts" and "Mourning".