Contrast and shadow fill

Still life shot - naked and diffused - with and without various kinds of reflectors:

Naked no reflector

Diffused no reflector

White card opposite - naked

White card opposite - diffused

White card - closer - naked

White card - closer - diffused

Foil - dull side - naked

Foil - dull side - diffused

Foil - shiny side - naked

Foil - shiny side - diffused

Foil - crumpled - naked

Foil - crumpled - diffused

I couldn't see a vast difference between the shots; the diffused shots are generally warmer with the background card more slightly yellow and the shadows are less harsh, but between the addition of reflectors I couldn't see great differences.  When I looked really closely, I could see that the colours were stronger in the foil reflector and that the crumpled foil reflected darker light.  The colours in the white card shots are stronger also than the colours in the dull side foil shots.  I don't think there was any great benefit though to adding reflectors to this subject matter.