I have seen both cases. For a long time I could only see myself as a 4w3. Despite the fact that I previously mistyped at 5w4 for many years.
Most people have very strong opinions on my wing - one way or the other - but it seems that almost everyone who knows me WELL, thinks it's 4w5, whereas my first IMPRESSION that I give off, is 4w3. I don't fit a classic sulky, depressive, isolated 4w5 description, but when I break down my deeper motives and fears it is more 4w5, and some of my deeper traits do match that description. I am wondering if my comparative "doer" and "in my body" nature is because of ENFP, and also 7 and 8 fixes, and I am in fact a 4w5 core.
4w5's have an edge. I wouldn't call it emo or depressive. I'm very outgoing in public (private is another matter) but I'm only outgoing so I can shove my personality up other people's noses. The four makes me want to be different and the five isolates me so I'm an island. My edge comes from not needing nor seeking the approval of others, and I frequently feel as if I've failed in my day if I haven't succeeded in polarising people.