Mouse controls and a more friendly UI. World gen improvements so it runs a lot (a whole lot) faster. More frequent bugfixes and the convenience of steam updating. 'Timeline' saves so you can kinda savescum your fort a bit if you like.
After the first batch of patches DF classic will be brought up to parity with DF premium, and they will then be developed together.
After the first batch of patches DF classic will be brought up to parity with DF premium, and they will then be developed together.