I agree with sol. If you have indeed found out your true type, it'll be the same in socionics, mbtt, colour theory or selfie contest. The problem lies in some tiny, tiny details that people overlook:
MBTT tests for PREFERENCES, not for COGNITION or TRUISM.
Socionics is about psyche schematic.
big 5 is behavioural(or at least it's how I view it).
Enneagram is about...is about...magic I guess. It's a fun theory, but do keep in mind it was conceived under the heavy influence of LSD.
Colour Theory(or rather Associative Psychology) is about the associations our mind makes with colours, images etc. Olga Tannenmann is notable proponent of this in socio circles.
Jung type theory(JTT) is about COGNITION, not PREFERENCES nor about BEHAVIOUR.
Each of them brings something else to the table and, frankly, each can help to achieve good dose of self understanding. As long as you can see through smoke and mirrors, ofc! Which means that there is an awful lot of "tests" online. You should trust only the official sources(omg AGAIN? I must suckle the big Te!) and then everything will be ok.