a lot More dense but more uniform placement which means uniform gaps and the light and dark on the ground texture makes it appear there is no grass in that spot.
in ACC i think they make it a different way to that used in old ac,. but with acc and here on my track the grid aspect becomes invisible when colour blended and viewed from above which leaves partial obscurity of the ground and grass together. when viewed from the side the grass appears more apparent due to the build up of alpha transparency which reveals the whole grass object as being more opaque than it actually is and thus more dense.