Hot Toys The Dark Knight Joker DX/Artisan 1/6 Scale Figure

[Earth 616 Collector]

which is which?

Left is InArt and right is Hot Toys.

 

[DarthAlias]

I can't help but see what looks like a crack in his hairline, what is that exactly?

Correct, these aren't truly rooted or punched like how JND does it via silicone so the start with the roots/scalp sculpted then glue in the hair.