Differences in Lasagna Gardening vs. Hugelkultur

I'm watching the 3-hour YouTube on Hugelkultur, but I'm having a hard time grasping the differences in lasagna and hugel. Is the main difference that hugelkultur only uses rotting wood on the bottom and that lasagna is layering mulch and other things?

This really made me consider how I understand each one. To be clear, I’ve never done either.

After pondering it, I realized that I think of hugelkultur as a garden construction project and lasagna gardening as more of a garden recipe.

To me, with hugelbeds, if I get the structural components in place (the big log base, the wood skeleton throughout, soil filling in the cracks) then I can play with different amendments in different spots. Dump/bury biochar here,  kitchen scraps there, chop and drop somewhere else.

With lasagna gardening, it seems more formal to me. I’m given specific ingredients, with suggested proportions. You’re right- I think the well-defined layering is big difference. And appearance: flat vs mounded with tall sides.

Looking forward to more experienced answers! I’m interested to close the gaps in my understanding.