Model From Project 3-1 With Mixamo Animation

The model is from unit 11, project 3-1. I wasn't able to upload rig from next project into Mixamo, so I used Mixamo's rigging system. The animation is from Mixamo. I imported the model and animation into Unity3D and filmed with the Next Gen Recorder. I then edited and converted to an animated gif using Premiere Pro.
Here's the model that Mixamo rigged. Note it is different from the model made from project 3-1 which is shown below. It seemed to fatten the model up making it look more like a mesh modeled character rather than a one made from the skin modifier.
The cover image is a still of the character from Unity. The head is a bit misshapen, but the overall it looks less like an extraterrestrial and more human.
Is there a way to easily do something like this in Blender? I tried playing with the solidify modifier, but wasn't able to do that improved the original.