Wow, this is amazing!
It took me ages to spot that the drawings were different, not just the colouring style, because I was looking at Grimsley first, but now I can see that even he is slightly different.
Haha, aww I don't think 'simpler' is the right word for it, I'd say that you've grown into your style and have refined it. The faces are more stylistic than before, but the details in the clothing are greater now.
It's so rewarding to do an exercise such as this to see how far you've come, great work!