I may be missing a few things, but from what I've counted, the differences (aside from percentage of completion due to this being made from the ground up with new code afaik), are as follows,
- New body customization options (horse/dog cocks, different ears/tails/body textures and color patterns)
- Revamped maps
- Fishing
- New enemy types (Incubus, cat boys)
- New clothing options (specifically underwear can be worn under "regular" clothes, and vibrators, cock rings(to be added), and the like can be worn under those as well.
- combat overhaul (magic and stamina are separate, non-magic skill will be introduced later, if I'm not mistaken)
- New jobs at the city (underground fighting ring, stripper)
- Milk store seems to be merged with the nursery; idk when or how the milking scenes will make a comeback (I miss those personally)
- More options that'd appeal those with preferences for furries and male partners
- Pregnancies are more prominent, when enabled, and the child is automatically put in the nursery
And that's as much as I can think of atm. from what I know, more things, old and new, are coming in future updates...
or, should I say, cumming? :p