I have both. The mods in AC are good and you can take a drive in some historic cars etc...its fun.
ACC is just a whole new level. It is a very focused sim and as such is far more advanced. It runs a more advanced physics and aero model with data recieved from the actual manufacturers. Its the most advanced sim for GT3/4 cars available commercially. But, there is obviously more to it than this when it comes to choosing which is right for you.
The racing is always very close - the driver is always the factor in winning or losing, never the car, car setups are easier to understand and more in line with real life setup changes, and there is always good action online - remember the bit with all cars being extremely close (BoP).
This game is a lot of fun. I really like it, take the overall gameplay loop of Left 4 Dead, add character classes and skills and make it in the Warhammer Universe. Biggest complaint is how overly monetized it is. There are paid character classes for $4, and there are cosmetic packs FOR those paid for characters FOR $9 without a sale\bundle! Cosmetics are per character, and can be up to $5 for some hats, and outfit packs that are $7. This is a game that is normally $30 it's too much..
I´ve looked so hard for a game similar to this and there is not a single game out there that has this standard. It gives you everything you look for in a strategy game with this concept. I love it.
I like space and i like dying in a neutron star
tnt on a astroid who doesnt want that
spend the best time on setting up controls
dont forget to accidentally shoot on the galactic space police :) they love u just as much as u do
overall score YES/10