Autel MK906 (New) and Autel MaxiSYS MS906 share the same hardware specifications, the same functions (OBD diagnostics, coding and service) on a wide range of car brands. Actually they are the same tools but have different name because they are sold by different seller.
Autel Maxisys Pro MS908P is the most powerful and can perform OBD diagnosis, coding, programming & service functions. Being an older Autel tool, its hardware specification is comparatively lower.
Part 1: Autel MaxiCOM MK906, Autel MaxiSYS MS906 and Autel MaxiSYS MS908P basic information comparison table.
Conclusion:
To do OBD diagnostic, coding and service, advise Autel MaxiSYS MS906 or Autel MaxiCOM MK906, they are the same tools but have different name because they are sold by different seller.
To do OBD diagnostic, programming and coding, advise Autel MaxiSYS MS908P
AUTEL MaxiSYS MS906BT is better than Autel MaxiCOM MK906.