Is it pretty much agreed on that the new version is better than the previous one? IIRC the only negative is it supports less players than before? Is that it?
The new version has better updated components, a smaller and more streamlined board, and also less cards. They chose the "best" 96 cards from the previous versions. It was basically made for people that play Agricola 3-4 times a year and want the newest up to date version.
The older version has way more occupation and minor improvement cards. The components are slightly worse. But it supports a 5th player and is compatible with Farmers of the Moor.