INTJs want closure faster, and will more likely take mental and physical short cuts to get there.
This is known as INTPs being jealous of how much faster Ni works than Ti, and thinking Te is all that goes on in an INTJ's head.
If you want the best data and conculsions, you might have to wait for it, because it will come from an INTP.
This is why the INTJ should be in charge of formulating the plan of attack based on which insights, developed via brainstorming sessions with the ENTP and INTP, he/she deems the most promising.
INTP/Js will both use reason, data, and the scientific method, but Js might have more of a motive of proving the hypothesis and coming up with more absolute results. Ps will more likely take in other variables as being plausible, more open to all ideas etc.
This is why the INTP will not get the job done, unless he/she has an INTJ telling them to focus.
So, in a hypothetical search for truth, the team should go:
INTP
|
V
INTJ + INTJ
|
V
ISTJ + ISTJ + ISTJ + ISTJ
This is what an INTP would like, but the search would be inefficient, take too long, and lose funding.
The proper team would be:
INTJ
| V
| INTPs+ ENTPs
V
ISTJs
In addition to the above-mentioned brain-storming sessions between the INTJ, ENTP, and INTP:
The INTJ would be focused on directing and communicating between the NTPs and the ISTJs.
The NTPs would be focused on the more exploratory, ground-breaking lab work.
The ISTJs would be focused on performing the tasks deemed necessary based on the results of the NTPs' lab work, as determined by the INTJ.
The project would be focused but flexible, broad enough to check the best possible options, but detailed enough not to screw anything up.
The results would be accurate, insightful, and obtained in an efficient manner, thereby maintaining the project's funding.
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INTJs are the rarest of the NTs for a reason: you need fewer chiefs than indians.
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With regards to the OP: I don't think you can distinguish between an INTJ and an INTP based on those criteria...