Judi fresh is always better if comparing organic to organic or non organic to non organic. Powdered is fine as well.
During the drying stage you can lose some nutrients but not too much depending on how it is done. Some cheaper powders may have fillers in them so you do not get 100% of the spice or herb. Always read the ingredient label to be sure.
If using powdered use organic to make sure you get the very highest quality.
Wally Bishop C.N.C.