why do you think that you might be an ENTP(or INTP)?
it might be kinda hard to tell an INTP from ENTP in some cases unless you have someone(whos internal workings you know reasonably well) of the other type to compare yourself to. with the case of reasonably introverted ENTP, you can see the difference to INTP by looking at Si/Fe, both Ne and Ti are usually pretty well differentiated in introverted ENTP and INTP close to being E, so there isnt that much(visible from outside) difference on that sector. INTPs tend to use intuitions to support thinking, while ENTPs tend to use thinking to support their intuitions. but with well differentiated Ti and Ne, it can go both ways quite often and its not easy to spot the difference.
do you know any ENTPs or INTPs to who you could compare yourself to?
i was thinking of trying to explain some differences between me and my ENTP friend(who isnt very extraverted and would probably score I>E in big 5), but the differences are so subtle that its not easy to give a clear differences. but some of the things are: he is more into sports(doesent mind to go swimming by himself or do that sort of stuff, i feel very awkward going to swimming hall, at beach or doing pretty much any activity on my own), he is less shy(but its not very apparent, since he isnt the sort of guy who babbles much anyways and i dont really get shy in real time, just when anticipating things, so its just that it sometimes inhibits me from starting things and doesent show in the actual interactions), dominating might be a wrong word but its kinda like he more freely interacts with the external world and doesent think so much about what others think about if he does this or that etc. , he is sort of more at home in the external world and interactions with it, while i am more careful, like on someone elses territory. when solving a puzzle, he tries different things till he gets it right or figures it out, i try to think before every move(which kinda shows the difference in our relations to external world). if we get excited about something and talk, i dont think you see much of difference between us, same if we are contemplating on problem etc.