I used datatables, the old version and the new version, and I really liked it. I have never used dynatable.js, but it seems that it does not have much traction (the last completion was in September 2014) and 30 thousand downloads (it seems low). Also in datatables there are many good plugins like col reorder, col vis, scroller and table tools.
If I had a choice, I would go for datatables, because it seems to be a more reliable product.
Bogdan.Nourescu
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