The question's as-stated. Was wondering thise, because the figures dont interest me much, but some of those heads are especially really nice. If they're ball jointed, I'd actually like to swap some out with my classics, like that Prime's head with the RTS G2 Prime.
From that one Kre-O Bumblebee review that was frontpaged the other day, I can tell you that at least Bumblebee has a ball jointed head. I'm pretty sure the ball joint is the same size as the enormous foot and ankles joints though, so I doubt you could get much head swapping done.
I got some Prime heads and neck joints at Botcon. The head is 95% the same style as Classics prime. it is like 5% bigger. The biggest issue is that the heads are made of a soft rubber/plastic and not the hard ABS type plastic that we are used too. The ball joint for the heads are not the same size as the limb ball joints. But the neck joint is still pretty big.
I didn't check Starscream, but I'll do that later today after I get some shuteye and get back to you.
Honestly, I hate that head too.. as well as everything about the mold. And, I'm not trying to be a little punk about it, but shit... the kre-o optimus head looks so good! lol
The Kreo basic bumblebee looks to be a perfect fit for a classics style bumblebee. I own the Kreo basic bumblebee and I can see it fitting in a deluxe toy. O and by the way it is ball jointed..