Agreed. When a facehugger infects something non-human such as a dog/ox in Alien 3, it didn't deviate much from the usual design of the normal human-borne Alien. The only change was that it walked on four legs instead of two. So an Alien born from a Predator would only show slight change and not much of a change like in the games.
That one you showed on top Navy, seems to be exactly what it would look like.
"There are five possible operations for any army. If you can fight, fight; if you cannot fight, defend; if you cannot defend, flee; if you cannot flee, surrender; if you cannot surrender, die."