Urgent! ! ! What's the difference between the descriptions of Li Longji and Yang Yuhuan in Li Bai's Three Tunes of Qingping and Bai Juyi's Song of Eternal Sorrow?

Qingpingdiao: The colorful clouds in the sky are just like the graceful dresses of the imperial concubine, while the peony in front of us is just like the beautiful face of the imperial concubine, the blooming peony and the beautiful concubine, so it is called "the country is very beautiful". All these meanings, including marveling at the beauty of the imperial concubine, praising the merits of Emperor Xuanzong of the Tang Dynasty, and rejoicing in one's own prosperity, will never be mentioned from the front in poetry, but they are expressed incisively and vividly, without any omission, and there are only four short sentences and twenty-eight characters. Who else can have such skills except being calm and calm, a fairy in heaven and a fairy on the earth, Li Taibai? Who has such handwriting? Famous flowers, beauties, sages and immortals are called "four wonders in the world" next to Chenxiang Temple in Xingqing Palace. Of course, Li Guinian, the most famous court musician in history, and his disciples in the Liyuan were there at that time, but they were destined to play the role of foil in this beautiful occasion. The Song of Eternal Sorrow uses direct description and side contrast to describe Yang Guifei's beauty with the words "If she smiles back, everything will be lost", which criticizes the dissoluteness of Tang Xuanzong and leads to a political tragedy, which in turn leads to his love tragedy with Yang Guifei.