>>7628648Double-checking, the dome isn't exactly the only issue causing the weird misalignment.
The issue comes from the way they sculpted the 2nd head with the swappable feature. Specifically the 2nd head sculpt seems to have the front portion arched upwards, pulling away the front part of the Xeno's "face" from the dome.
Comparatively, the default head is sculpted in a "relaxed" way with the front portion laying nice and flush, giving it just the right length to touch the front part of the dome.