Hey there!
Steam version may suffer some changes considering everything that is going on right now over there. Overall it should be pretty similar to the prologue so far, but will the full content.
Cheers!
Viewing post in Ataegina Act I Prologue (Remaster) comments
Yes... If you do a quick google search you'll understand what I mean about Steam (New rules)
The remaster will be the Full Game Act I + Act II, but right now you can consider the Prologue like some sort of DEMO that ends right before the path split. When the MC is attacked on the Ship before he wakes up with Bredita/Isabella/Ayna.