Between Ocean Forest and Roots Organic, I noticed the Roots Organic felt lighter, appeared to be more breathable, and typically feed for few weeks longer. I'm not 100% sure, but I could swear I thought my plants even grew faster in the Roots Organic. However, the Ocean Forest was half the price. And by the end of the season, all the plants harvested about the same.
That got me thinking, I wonder how cheaper soils measured up. So I tried a few brands at home depot.. earth gro, super soil, kellogg patio plus, mel's mix, Miracle Grow Organic, and MG with Six Month Feeding, etc.
For the most part, the same results happened. Some plants had growth spurts early on, but in the end they all evened out. There was some soils that stood out, which was Roots Organic and Kellogg. The Roots usually did better, but not by very much. So I ended up sticking with the Kellogg. Mainly because it performed better then the Ocean Forest, almost as good as Roots Organic, but only cost $4 a bag. It was even cheaper then the Miracle Grow stuff and is completely organic.
The only thing I didn't like about Kellogg's soil was that it was heavy in bark. I don't know why it bothered me, maybe just because it felt heavier and like it wouldn't hold as much water as the coir based FF and RO, but yet it did the job. I'm sure it wasted a bit more water, but it didn't dry up hard like the MG or any of the peat moss based soils.
Also, I think a big reason why the soils evened out so much is that I didn't just let the plants die when the soil stopped working. I continued to watch and take care of my plants. If they needed something, I fertilized them.