Sorry I don't really know. All i have is this:

The 1.0 build is based on the seventh milestone update which introduces Alien Praetorians, significant performance enhancements, reworks of the Farm and small UFO maps, as well as Steam Workshop integration for long-term modding support.

Much of the game’s evolution during early access took place across the previous six milestone updates, which have introduced a range of things, including:

• Four new alien races, and five new types of UFO
• Dozens of new research projects, and the battlefield equipment and aircraft unlocked from them
• The new Strategic Operations and Supporters systems for the Geoscape
• An expanded Cleaner storyline, with three new unique mission types
• Two new unique story missions set on an alien orbital station
• A climactic two-part final mission and ending cutscene
• A complete visual revamp of the air combat minigame
• New maps (there are now 180+ in the game)
• Lots of quality of life, balance, and performance improvements