My best friend IRL is an ENFP (mbti)
And yes while this is a socionics theory the socionics types do match up fairly well with the MBTI types bar a few differences, function order etc. I'm an ISTP in both. Some people however change completely, though if they were boarder line in MBTI they are usually sure of it in socionics
It may seem at first that your duel wouldn't work but you actually complement each other really well
On the forum here there is a lot of talk about N-N relations, IRL though I haven't seen as many working, in theory yes but in action?
Nothing fails faster than two Ns lost in their minds and not contributing that concrete practical need of the relationship and vice versa with two Ss that seem to get "stuck in a rut" and the relationship becomes very boring
The SJ/SP pairing is ridiculous as the temperaments have basically opposing attitudes
The most important letter for a relationship to work is J/P yeah you could argue that an N or S might misunderstand each other from time to time but at the end of the day if you are both Ps you have the same methods and won't be jumping down each others throats because the dishes weren't done by 8
My ENFP friend gives me valuable insight into possible outcomes and we often help each other out in really amazing ways