Canon 6D and Canon 60D with the Canon EF 70-300mm 1:4-5.6 IS USM

I bought an old Canon EF 70-300mm 1:4-5.6 IS USM quite a while ago and like how some of the portraits I have been taking with it turned out.  I decided to test it a bit more both on my Canon 60D and Canon 6D.  This was no exact test as F-stop and such are not identical.  More of a test to see things closer.
If I could get the Canon EF 70-200mm f/2.8L IS II USM lens I would.
Only editing was moving the RAW sliders around.

I really don't like the way any turned out, there is something with the focus that is just a bit off.

This was a quick adjust settings, point and shoot:

Canon 60D f/9.5, 1/250 sec., ISO-640, Focal length was 70 mm then I cropped this picture.

 Canon 6D f/8, 1/250 sec., ISO-400, Focal length was 300 mm

Canon 60D f/9.5, 1/250 sec., ISO-640, Focal length was 200 mm

Canon 6D f/7.1, 1/250 sec., ISO-1600, Focal length was 180 mm