Hey dudes
Bit confused
GOG has Z The Game
But on Steam there is

Z

&

Z Steel Soldiers.

Are Z and Z The Game the same game? (if they are why the different naming convention)
And dev just posted GOG should have Z Steel Soldiers but its yet to be released......?

Yes. Because it was hard to find in GOG search - typing just Z would bring nothing, that's why they choose to change the name I guess.

I think they're waiting to get as many bug fixes as possible out of the way, so there are fewer patches to worry about.