You now have the End Game arrangement. If we consider only the order of the pieces on the top face, and not the possible color combinations, we find there are only three possibilities. The number of possible arrangements increases when we consider the colors of the corner pieces on the top surface. However, it develops that the only time color is significant is when we ask whether or not a given piece has its top color on top of the cube. All four pieces are in the correct order.
Color is immaterial.
Two pieces opposite each other are in the correct order. The other two pieces are also in the correct order relative to each other but are out of order relative to the first two pieces. Color is immaterial. Two pieces adjacent to each other are in order and the other two are out of order. Two pieces adjacent to each other are in order and the other two are out of order.