@seppli: It's mostly scenes with bright sunlight. There are scenes in BF4 that look great but any map where you are outside in direct sunlight it gets really harsh looking. This applies to all of NFS Rivals since the entire thing is outside.
With PVZ they don't have a super bright light source anywhere. It's very overcast looking. If you look at the first gamplay trailer (http://www.youtube.com/watch?v=jYjUrHOY7A4) it has the same harsh look to it.
I've only ever noticed it with Frostbite games. If anyone has any examples of games that use a similar style and don't use Frostbite I'd like to see them.