The discrepancies, in my experience, are based on the level of development of the auxiliary and tertiary functions. If you have an ESTJ with a well developed Ne, you can find yourself with a mess on your hands if they use it to further some of their xSxJ pursuits (mainly miscellaneous loyalties to society). Here is where you find your most vocal stereotypers and fanatics in the realm of ExTJs. They are also the ones who tend to unintentionally masquerade as ENTJs.
Now that the mildly insulting and technical part of the post is done, let me name some of the reasons why one of my closest friends is an ESTJ. Your average ESTJ can be surprisingly scatter brained, and very hard on themselves. I find the latter annoying, because I consider my mental disorganization critical mass. :wink: However, they do know how to organize those thoughts and get everything done, despite over committing themselves. I am impressed by this trait. You can also differentiate between the two based on the flexibility of their logic. ESTJs, IME, tend to answer to the facts, while we answer to what is most efficient (Often times they overlap, but sometimes they don't). They also keep us grounded with these facts when we begin to succumb to our Ni. However, I find ESTJs are more polarizing than ENTJs - people really do either love them or hate them. In short, a healthy ESTJ is one of an ENTJs best allies, and valuable to any organization.
Now that the mildly insulting and technical part of the post is done, let me name some of the reasons why one of my closest friends is an ESTJ. Your average ESTJ can be surprisingly scatter brained, and very hard on themselves. I find the latter annoying, because I consider my mental disorganization critical mass. :wink: However, they do know how to organize those thoughts and get everything done, despite over committing themselves. I am impressed by this trait. You can also differentiate between the two based on the flexibility of their logic. ESTJs, IME, tend to answer to the facts, while we answer to what is most efficient (Often times they overlap, but sometimes they don't). They also keep us grounded with these facts when we begin to succumb to our Ni. However, I find ESTJs are more polarizing than ENTJs - people really do either love them or hate them. In short, a healthy ESTJ is one of an ENTJs best allies, and valuable to any organization.