pyros, at least a-php.. have, IME, some kind of "spirit" of their own.
normally only psychedelics, deliriants and dissos have something that you can call "spirit", maybe some empathogens like mdma and 6-apb have something akin to a spirit, to a certain degree.
some people call that "spirit" the "headspace", but i'm not completely sure if both terms are exactly the same..
usually stims don't have a headspace, or, if they have, it's extremely weak and secondary to the experience.
a-php and (I guess, reading to several experiences/reports) other pyros seem to have an important headspace, some kind of spirit that goes along the stimulation and it's not euphoria, focus or body high..
when talking about a-php (don't know a-phip) some people call it "eerie" or evil, like it has a creepy dark vibe to it,
I've felt it several times, specially in the beginning,
sometimes it's even overpowering, but it tends not to be, it's quite fickle and inconsistent, but undeniable when it happens.