On the left is the image from 80-200, F2.8 @190mm, on the right is the image from the 28-70, F2.8 @70mm. They both look very similar. The images is actually less sharp here due to some compression into jpeg files. It's a little sharper in Photoshop.

Images are not sharpened or edited in any form, except cropped at 100%. ISO 400 is used.