Not sure that it would make a difference. Maybe its a matter of personal choice. I grow in coco using the autopot system. Its a bottom feed system but requires top feeding when the plants are potted up in their final home so that the roots are established before the autopot system is turned on. That's about a 10-14 day process. For me its a matter time. The less time I have to spend watering the better I like it. I top water until runoff and then again about every other day, depending on the plants. With coco its hard to overwater, another reason I like coco.