Reed,
the one on the left is excellent. I notice that you've left some stumps on, but I don't think these would make good jins as they're a bit low down. I like the new potting angle too. For a bunjin, if that is your intended style, I think you'll need a shallow, round pot (preferebly unglazed) for the finished tree. I noticed you mentioned field soil, do junies have symbiotic fungus in the roots? I cant remeber the name for it right now, but someone wil know what I mean
Anyway, good stuff. Keep it up!