Of course, 52 1 is better than 520, which is an evolved version (upgraded version) of 520. Personally, I think the effect of this brand is relatively general. After all, it is 100 yuan. The sound track is fine. The channel of 52 1 is better than that of 520. The speaker unit has been optimized and the power has been increased. If you use a notebook, this is ok, it suits you. 52 1 seems to be much more expensive than 520. Please see for yourself. I hope my answer can help you!