i think this INT thing with aspies is that they are actually IST's more often(more likely ISTJ), but their S is disassociated from their other processes and falsely test as INTs. its common for people with aspergers to be really focused on details of external world, so much focused that it draws all their energy and cant properly distinguish 'what is'(due to the disassociation of S).
the idea of aspergers is that different brain regions arent first of all communicating with each other properly(some areas lack proper connection and some areas have really strong connections), some areas are poorly developed(not much processing power) or are really strongly developed(and try to do processes with the developed areas that arent usual for them, for example reading with visual cortex, while normal people transport the visual imaginery from text to other areas which process the reading).
i have heard of 3 basic types of personalities in autism;
-photo-realistic; thinks in static images
-music, mathematic; thinks in visual patterns, are naturally good at music and some types of math
-word-logic; is good at names and statistics
photo-realistic type is afaik the most common with aspergers, i think this is the typical ISTP aspie who often gets confused with INTP, but visual cortex playing a big role(and at least one case of these had a super strong wiring to areas involved with Ti and really crap on opposite Fi side), which is not common for INTPs, but is related to Se. i think because of the typical ISTP attitude of paying attention to details in external world, gets dimmed due to the intensity of how external world is perceived, creates similar voluntary disassociation of the objects that INTPs generally have, so these types look like INTPs often. i also think that people with autism experience their unconscious mind much differently than healthy people do and live much more of the life of the unconscious, not because it would be larger necessarily, but because the confusion it evokes is much greater(due to it not being compatible with the external world), thus it feels more intense and distracting(which also might make them seem as INTPs, but its actually the Ni playing role here).
music, mathematic is most likely closest to INTJ
word-logic is most likely closest to ISTJ