-1207 Vehicles (standard and premium + addition of new vehicle later).
-33 Circuits (71 configurations).
-New Graphics engine (made improvements of vehicles and circuits, lighting, interior views, etc ...).
-New Physics engine (better management of suspensions, aerodynamics and tires).
-Weather Scalable, time zones and astronomical simulation system.
-Menu Clear, simple and very short loading times.
-mode Online multiplayer and split-screen.
-The Ability to create its own circuit on a 2500km² area and add what one wants (bridges, trees, lakes, mountains ...)
-Settings And richer parts changes (adding nitro), and customizing its driver.
Weak points:
-Collision Unrealistic and minor damage (but improved compared to 5).
-His Toujour unsatisfactory engine (soon improved by maj).
Conclusion: Very good game motorsport, created by enthusiasts for enthusiasts, huge content compared to competition, and graphics in all pretty for a PS3 at end of life.
PS: For microphones transactions is an option not completely indented therefore worth down the game for nothing ...