Stirlingengineforum.com

I found two interesting videos about the magnetic engine. One which shows how to build one: https://www.youtube.com/watch?v=jKhKs2LeY58 And another with seems to have regenerators built into the displacer: https://www.youtube.com/watch?v=LcI9QH4nLF4 As you mention that the displacer moves too fast, ...

Has anyone done some comparisons between a LTD magnetic engine vs a LTD gamma engine, side by side under the same conditions?
I wonder which one works with smaller temperature difference.