1. The Namdharis have a modification of the 5 K's, the Kirpan is reduced to a small symbolic Kirpan on the Kangha. In comparison the AKJ modify the Keski to a new K. However the Namdharis have a symbolic Kirpan, and lack a real Kirpan. While members of the AKJ have all 5 K's including Kesh, but believe the turban (Keski) to be a K, rather than Kesh.
2. The Namdharis accept the Adi Guru Granth Sahib as a legitimate Sikh scripture, but not as a Guru. The AKJ accept the Adi Guru Granth Sahib as Guru, but believe not all of the scripture is authentic (raga mala).
3. The Namdharis believe in the authenticity of the Ugradanti bani. So did the founding father of the AKJ, Bhai Sahib Sant Randhir Singh Ji. Incidently so do the Nihangs.
4. The Namdharis believe in Bibek (ritualistic spiritual hygiene) from non- Namdharis. This is also the case for the strictest in the AKJ sect, while most AKJ's will eat from most other Khalsa amritdhari Sikhs. Incidently some Nihangs also practice this. This involves not eating of the hands from a person who serves and eats meat and drinks alcohol. Or in circumstances that their food may not be in sucham as it will be prepared in the same place where meat and alcohol is being made or drunk. This also applies to eating from restraunts where meat is being made.
5. The Namdharis, like the Radha-Soami's believe that they have the Nam from the Guru. This is of course exclusive to their sect. This is the same for the AKJ.
6. The Namdharis, AKJ, are staunch vegetarians. Incidently Damdami Taksal, Nirmalla, Radha-Soami's, as well as most other Hindu sects, are strict vegetarians.
7. The AKJ may have copied the breath meditation technique from Namdharis who had been doing it for a hundred years previously. Namdharis were noted by the British observers as doing Naam Simran with a specific cyclical method of Naam Simran and breathing. The records state this involved emphasis on the latter half of Vah-i-guru causing the r sound to roll, and this created the well-known kuks which is why they were called Kukay. The AKJ are renowned for doing this.
8. Namdharis perform Kirtan with traditional instruments, and in Rag measures. The AKJ perform Kirtan in Punjabi folk geet style.