Judgment: Which of these two calligraphy is the original?

I don't think either of them is true. Compared with the other one, the handwriting on the right is a little better, mainly because it doesn't feel the "charm" of the characters, which is elegant, concise, tangible and boneless, and really doesn't look like Qi Gong's own handwriting.

However, it is a bit ridiculous to distinguish the authenticity of famous calligraphy and painting on the monitor in front of the computer. I think it's still necessary to ask professionals to make a careful appraisal on the spot, so as to have a more accurate judgment, because there are still many details, such as paper, seal, mounting technology and so on. This requires careful observation before making a judgment. I hope it will help you, please refer to it and wish you a smooth, happy, happy and healthy New Year.