Patterns D1 and D2 shown in Figure 6 are different in several points. However, black domains or the slanting lines exist forever in the interlaced case, unless those move right and those move left exactly extinct in pair. Secondly, a border between a black domain and a white domain goes left or goes right at a constant speed in the interlaced case, but one can move left or right freely, depending on the order of computation, in the randomized case. Particles or lattice defects moving left or right can be seen in both cases. Particles can move in both directions, such as Brownian particles, in the randomized case.
Particles can move either left or right in the interlaced case.
If two particles crash, they always seem to disappear in the randomized case, but they often cross or reflect each other in the interlaced case. Particles can also crash and disappear in the latter case, but this type of interaction can occur only in the early stage. Firstly, two black domains sometimes merge into one in the former, but they do not in the latter. Secondly, black domains move left in both cases, but the speed of this motion is much slower in the former. However, they never move right.