Xoanon Reptilia seems to be an early version of Xenon, or at least Gamebase makes the link with the game. So are they the same game?
This preview just seems to be a simple vertical scroller at this stage, with sort of Xenon/Xenon 2’esq backgrounds. It’s likely to be a completely different game, but we’ll see.
There are no credits attached to it, so it is a bit of a mystery about where this game come from and who it was for. Hopefully someone will be able to step forward at some point soon!