From my personal experiences, the intimacy factor between INFJ and INTJ is quite ferocious and deviant. Inferior Se definitely influences a hedonistic and animalistic dynamic. The thing that I found lacking in the relationship was the emotional support, especially when I was having emotional ups and downs. INTJs focus on solving problems, whereas INFJs focus on tending to their partner's heart. In discussions, INTJs often get involved in debates, so otherwise peaceful INFJs that seek consensus might not feel 100% comfortable in this situation. Sometimes I would have heated arguments about caring for people involved in a situation, as well as showing support for theories for theory sake. INTJs will dismantle this, even if they are romantically involved with you. So be prepared to have your values challenged. It may rile you up a bit. Compromise is seldom in their vocabulary.
INTJs are very very selective as to who they show their affections to. They can be sweet when they really care about you. But it isn't soft and squishy warm Fe love, though. INTJ Fi based affection feels different to me than Fe. The affections will be focused on you and your INTJ partner, with very little regard to anyone else. INTJs focus on you and them in the relationship, rather than taking in the rest of the family and friends. Fe looks to harmonize and get everyone to get along, whereas INTJ Fi is perfectly okay being alone in their personal pursuits. If you're looking for someone who will help you to deviate from being bound to pleasing others, which can be an issue with us INFJs and the infamous martyr complex, then an INTJ would help you develop even more individualism. But if you're searching for consensus, then an INTJ would challenge that. Potential issue with regards to aux Fe vs. tert. Fi dynamic.
But, even with these challenges, the connection with INTJs are rewarding. Getting involved in Ni-based meta discussions can be liberating. INTJs are helpful in pointing out steps to realize your goals. There may be factors irl that you as an INFJ may have missed out. INTJs come up with strategies to get there. Be prepared for them to bluntly tell you if something will not work, though. Even when they love you, they will still offer constructive criticism. But the meta-discussions are well worth it. It usually helps when you two have a common passion to build off of.
There's overall a good dynamic, but be prepared for bluntness.