In Love with Power (2012)

- Both dramas' female leads are Da Yu Er and Hai Lan Zhu. Hong Tai Ji loves Hai Lan Zhu while Prince Dorgon loves Da Yu Er.
- However, while the story of In love with power focuses on romance, Legend of Xiao Zhuang balance between love and politics.
- Hong Tai Ji, Prince Dorgon, Da Yu Er, and Hai Lan Zhu in The legend of Ziao Zhuang have both positive and negative sides. None of them are completely good.
- However, if you like couple Hong Tai Ji and Hai Lan Zhu, you will enjoy The Legend of Xiao Zhuang more because Hai Lan Zhu really loves Hong Tai Ji in this drama and this drama also explains why Hong Tai Ji loves Hai Lan Zhu.

Both dramas male leads are Emperor Hong Tai Ji of Qing Dynasty.
Both dramas focused on romance more than politics.

Both dramas are based on the same history surrounding Hong Taiji and Da Yu'er. The characters in The Promise of Chang'an are counterparts of historical figures in Qing Dynasty during the respectful time period:
He Lan Mingyu - Da Yu'er
Xiao Chengxu - Dorgon
Xiao Chengru - Hong Taiji
He Lan Wanyin - Ha Lan Zhu
The only significant difference is the Promise of Chang'an is set in a fictitious dynasty rather than the Qing Dynasty due to censorship.
It's also ironic that Han Dong (who played Dorgon in 'In love with Power') plays Xiao Chengrui, Hong Taiji's counterpart.