We've put together a comparison of these two impressive headphones HIFIMAN HE400i vs Beyerdynamic Custom One Pro Plus. Based on our rating, HE400i has a total rating of 6.5 out of 10 vs 7.5 out of 10 for Custom One Pro Plus.
The Beyerdynamic Custom One Pro Plus is better headphones in this comparison. Check Beyerdynamic Custom One Pro Plus price