1) steam version contains season one (patch 0.1 to 0.10), which is about 150 renders and +100.000 words of content.
2) steam version is also a permanent copy of the game. you get to keep the game forever.
3) when season two is finished, it will be published on steam and sold as a dlc/new season.
if you want the most "complete" edition just get the ultimate version. sorry if this is confusing, but i'm doing what I can to monetize my work, i'm just a girl..
edit: omfg i sound so rude im sorry i sound bitchy all the time its unintentional lol contact me on discord ill make it up for you