What is the difference between 3D, 3DXD, & XD?

Exactly just different prices and different quality of the picture. I recommend the XD over the 3D because you don't have to wear glasses in XD and you don't have to worry about getting a headache

Xd no glasses.

I typed your question into Google and found a bunch of answers. Maybe you can give that a try?

Mostly $$$$$ little bigger screen more speakers