Head pegs

I’ve noticed semi real heads fit kinda off on anime style bodies, but is it the same vice versa? Like are the anime heads loose on semi real bodies?

I am a bit confused, aren't all the bodies the same?

Yes the bodies are all the same. I believe there have been some minor tweaks to the frame design over time, but the bodies made around the same time should be relatively the same, except for normal manufacturing variance. There's no anime head specific body or semi real head specific body.

There might be some small variations in the neck hole size on the heads themselves, or in the thickness of the pegs on the frame. That's normal for any manufactured product, especially one made the way Danny makes his stuff. As long as the variation is within a certain range of sizes, it'll still pass quality control. But aside from that, all Smartdoll bodies are the same, and aside from variations in the sculpt of the face, the heads are (mostly) identical too. It's why they can all fit on the standard body and share headcaps.