Received the 4.1 D3V 2nd today.
Attempting to post a picture, please forgive the image quality my phone is getting pretty old.
https://goo.gl/photos/AdC97hvrzYq5jack9
They are in order left to right:
2.7 with red and black G10
Old Spec 3.5 with green micarta
4.1 D3V with camo G10
4.7 CFV with black canvas
4.7 20CV with camo canvas
5.1 20CV with brown canvas
The 4.1 handle feels really good, but not quite as hand filling as the 4.7.
Comparing them side by side I can't see much difference, the two handles are really similar other than the arched back and a bit of flare on the butt of the 4.7.
Notice how scrawny the old spec 3.5 handle appears compared to all the new spec knives.