All that needs to be said is what's below, I'll accept slightly less rain effects for for of the following.
FH2=Open World
Dc=track based
FH2=1000 member clubs
DC=7-10 member clubs
FH2=Weather Cycle, Dynamic Lighting, Day/Night Cycle all avaiable at laun
DC=Weather and day/night cycle will be patched in post launch (you can only select day or night at launch)
FH2=200+ cars
DC=50 cars
FH2=Fully Customizable
DC=Can only change car color with no other customization
Fh2=Seamless Singleplay/Multiplayer
DC=Have to go to the main menu and select multiplayer
FH2=Play meets where car templates can be shared and downloaded
DC=millions of trees
FH2=Car damage is aesthetic and actually affects the car
DC=Car damage is aesthetic only