I aim to compare the muscle states with MOCO using two musculoskeletal models: Hamner2010 and LaiArnold2017. Nevertheless, even though I am using the same static trial, marker position, and scaling setup between models, I have "slightly" different results. For instance, after scaling there is a 3 deg difference between models and this is even more visible when I run IK: Both models give similar patterns but not exactly the same (+/- 4 deg difference in each joint). As you can see in the following figures:
After scaling:
![Image](https://www.udrop.com/cache/plugins/filepreviewer/184766/5828572f16f6cf6cfcf09b4a6080330cf97cdaf82b39eee023003aa6591e0361/1100x800_cropped.jpg)
At IK:
![Image](https://www.udrop.com/cache/plugins/filepreviewer/184764/b7d5b9087fa8a94195c55b2b04cd92664f5571b3aae7c2972bb6b99dfe91bb52/1100x800_cropped.jpg)
Thus, I would like to know if there is something that I should do in order to have the same calibration (e.g. same IK) between these models. I am aware that the knee definition between models is different (thus ankle, knee, and the hip joint would be different), but I am not sure if this is the main issue (this would not explain why there is a difference in pelvis tilt which would affect hip flexion/extension).
I attach the static trial, marker position, and scaling setup for both models.
Israel