Fixed. As far as 'speed' of thought, the speed of Ti/Te depends on if it's the individual's primary function, seeking resolve, or if P is their primary function, seeking exploration. For INTPs and ENTJs, T has no perceiving primary function to elongate it. These types are primary judgers who come to quick decisions.
The true difference between Ti and Te, since they're both inclined to deep thought and decisiveness, is whether it comes to decisions via a firm internal worldview (Ti) where the "definitions" are clear and assured (Ti), Or whether its rationale is about individual external contexts (Te) where the "factors" are clear and assured (Te.) That's usually why they say thinking is thinking, xNTJ does whatever an xNTP can do, but they have different values cognitively:
The introverted function is manifesting viewpoints via -> the subject, while the extraverted function is processing base information via <- the outside. Thus xNTJs stay with an open-minded worldview (Pi) while preferring resolve in factual summaries (Je.) xNTPs stay with building a solid worldview (Ji) while preferring participation in the change of new outside perceptions (Pe.)
Thus, xNTJs will look at one thing in a hundred different ways (JePi), while xNTPs will look at a hundred things in the same way (PeJi). The 'way' is the internal processing (Xi), the 'thing' is the outside objective fact (Xe) we're dealing with. This is the J vs P difference in general. Has very little to do with if you have a decisive tendency to life, that is if you're Judging primary or not. Nothing to do with Te. Te is about assuming order to outside factors and objects.
True J vs P thus is about whether the external situation has been summarized and an object chosen, or whether the external situation has been left open to perceive and an object not yet chosen. I hope this opens you up to the more rational and technically correct way of viewing the cognitive functions as they occur.