Thanks for the comments!
I'm kind of new to 3D and nearly the same experience with Godot and Unity so the difficulty was initially the same (also, used different approaches to make the simple models) and the production time.
Bugs in the end are similar, too similar (like sometimes both engines decide to ignore a random collider).
Advantages in Godot were Gridmap (is a bless, making the floor in Unity is a mess), stepify is great for grid based movement and no need for 3rd party stuff for easy glowing.
Also, not in the game but I was trying trails for the cube and U was impossible to make it work on mobile, while in G works everywhere.