What is the difference between SKM_Manny and SKM_Manny_Simple?

Development Character & Animation
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1

I am learning how to animate in Unreal 5.7.1 and a lot of videos show how to animate using the SKM_Manny skeletal mesh.

However in 5.7.1 all the example content appears to only have SKM_Manny_Simple. Which appears to not have some IK controls.

I don’t understand these extra features yet, so here are some questions:

  1. Why is the non-simple skeletal mesh not included in the default templates?
  2. Attempting to add sample content (mannequins) does not work because it shows as incompatible with 5.7.1
  3. How to get the complete skeletal mesh, is it part of a specific sample project?