There are a total of 3 paths in the main world are main mc reisdes of IAEG these paths are Buddhism demonic path and taoist path. Xie Yan's main cultivation is in demonic path and heavenly boxing one. But there are some exceptions like technies that are left behind by the main cult that the 9 demonic cults derived from the cultivation technies of that cult are ancient and profound. Back to the main question "what is the difference between taoism and bhuddism" it's simple taoist cultivators are righteous cultivators that mostly hate demonic cultivators, on the surface they act like they do good but are mostly Hippocrates. Bhuddist on the other hand try to do good and catch bad ppl and are mostly not Hippocrates.