Both have more experience with formal education.
So, what you are saying is that the theory is absolute. It must be correct. Are you trying to prove that INTPs are not as open/flexible as INTJs by demonstration? If so, you haven't dealt with an INTJ that believes something deeply. You are going to have to be a lot more forceful than this.
Both are INTJs, though my GF is not formally tested, my friend was.
Ti is more analytical than Te because
Ti is more flexible to alternative theories. Again, by definition, Ti is TP, and Te is TJ. The flexible dimension results from the P and J - Te is fundamentally different than Ti in that regard. Ni-Te is the creative approach to creating a fixed result. Being 'open' is only one part of being an N. And flexible and open aren't interchangeable, especially not when open refers to creativity and the like.
An INTJ will schedule a fixed set of concepts and see them through. He is creating an inflexible environment, one that was created in his head before. An INTP can be just (if not more so) creative, but will then continue to adapt his ideas (internal) and the world around him (external). If you had to listen to the rules that my GF set down at work... And dear god, if you had to see how certain chores 'have to be done'...
I can give you dozens, if not hundreds, of stories of how INTJs dictate a system/schedule and that it exists in their mind even more than in practice... Just as I can tell you stories for myself - and my ENTP friend - that shows the exact opposite from the NTPs.
Did you see the picture of the dog that I posted? That dog was dumped on my lap. I'm flexible, however, and haven't defined my environment, so I worked the dog into our life. I'll let you guess how my GF reacted,
despite it being her choice to take the dog. And my INTJ friends is getting married? Want to hear about his wedding schedule? Want to hear how he planned his proposal? I quite love the story from my friend that cut lunch short (while with his date) so that they wouldn't be late for their walk. Their open ended walk. (The quality that she saw in him was that his attempt to make everything work perfectly was charming! Her words...)
I'm not sure what it would take to show you that reality is not reflecting your theory. Let me know what conditions would change your mind, and I'll try to satisfy them.

As an analytical INTP, do you not see the flaw with dismissing things with such a blanket statement. Anything I say can be thrown away,
simply because you don't agree with it.