More info on the size of the Meteors I would say it was about the same. In laws case, there was nobody to worry about for collateral damage, just the three of them. Zoro had cut one meteor into 2, the collateral damage would have most likely been more, there were other people in the area. Zoro should have just cut the thing into pieces and disintegrated it with one move, just like how mihawk did it lol