I am a sophomore in Changsha, and I am also a liberal arts student. Most of my classmates bought 53 or 32. To be honest, there is not much difference between 53 and 32. I just need to buy one, because many of them will be repeated. For Hunan candidates, it is better to take 32 as the main subject, because the new curriculum standard of Hunan was implemented in 2007, and some topics of 53 are too old, so 32 is better.
For politics, history and geography, 53 and 32 are all good. It is recommended to use 53, which has a wide range of topics and is easy to master knowledge points after doing the questions.
The above is what a teacher in senior three told me. I hope to adopt.