It seems strange to me that these weren’t changed for DE, considering Cataphracts got changed quite significantly.
Unsurprisingly, Berserks and Mamelukes looked different in prerelease versions of AoK. The Berserks (which were called Berserkers) didn’t have horns. Here’s how they looked:
and a render from a press kit:
Here’s some Mamelukes:
Not sure what’s going on with them since they don’t seem to have weapons.
Here’s a thread suggesting a couple of different names:
You definitely didn’t miss it – you were the first person to reply!