Curcumin is basically the active ingredient (anti-inflammatory) in turmeric. Turmeric is used in cooking. My integrative medicine doc prescribes Curcumin.

botanicalinstitute.org and livestrong.com both came up with info when I googled Turmeric vs Ginger, Turmeric vs Curcumin, and Curcumin vs Ginger.

From live strong:
"Ginger and turmeric -- common kitchen spices used to flavor and season foods -- have several characteristics in common. Both are tropical perennial plants classified as belonging to the Zingiberacaea family, and both have beneficial constituents in their rhizomes -- or roots -- that cause them to be prized in Traditional Chinese Medicine and Ayurveda as healing herbs. However, ginger and turmeric have different properties, colors, flavors and effects."

Both are inflammatory. Ginger is good for tummy. Curcumin tends to be used for arthritis type pain. Botanical Institute has a chart showing differences if you go on the site.

I have been using Curcuselect 500 mg curcumin (Moss, requires MD signature). Not sure it is helping. I eat ginger because I love it! Another supplement brand I like is Pure.