Subtypes don't exist. I hate subtypes. They aren't really subtypes, but rather "variants". I mean, cognitive pattern is the same. As long as aspects of reality are 16, types will remain 16.

There are many subtyping systems. The most popular is the Initial/Terminal subtype system.

Initial means "Judging subtype", and Terminal means "Percieving subtype".

Here are the preferred physiological configurations for each type. I'd use Model Phi, but here I'll use enneagram because it's simpler.


Alpha :

ILE-Ne : 7
ILE-Ti : 5
SEI-Si : 4
SEI-Fe : 9
ESE-Si : 2
ESE-Fe : 3
LII-Ne : 5 (intimate)
LII-Ti : 5 (social)

Beta :

EIE-Ni : 6
EIE-Fe : 2
LSI-Se : 8
LSI-Ti : 1
SLE-Se : 7
SLE-Ti : 8
IEI-Ni : 4
IEI-Fe : 9

Gamma :

SEE-Se : 7
SEE-Fi : 8
ILI-Ni : 4
ILI-Te : 5
LIE-Ni : 5
LIE-Te : 3
ESI-Se : 8
ESI-Fi : 6

Delta :

LSE-Si : 1
LSE-Te : 3
EII-Ne : 1
EII-Fi : 6
IEE-Ne : 7
IEE-Fi : 9
SLI-Si : 9
SLI-Te : 6


Besides, you can see the "extravert" subtype has usally a more "lively" type.