Improved textures and sound design that make the squelch of a tentacle feel uncomfortably real.
The "Better" in this version refers largely to the refined controls and expanded tech trees.
I am writing this article based on the most likely interpretation: that you are looking for a deep dive into an that has recently released a comprehensive "Full Version" featuring more content and improved mechanics.
The Unfathomable Depths: Exploring the "Rise of the Lord of Tentacles" Better Full Version