And the latest picture as of last night:
Any guesses as to which one was my original soil?
Anyways, right now I would say Jifffy All Natural seems to have faster growth but MG Nature's Care seems to have a better propagation rate. Ultimately, I think any growth medium is better than the cheap stuff.
Also, I did get this same (well nearly the same, a couple of different plants since I ran out of seeds for two) experiment setup under my grow light last night. As soon as they start sprouting (7-9 days from now) we will see how well the grow light does compared to actual sunlight.