Framing/perspective was hard since I didnt have a tripod handy but:
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vs.
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The biggest thing I can notice is the amount of foreground. In the 200mm shot, you can actually see the front edge of the board I shot on. In the 50mm shot, you're only seeing about half the front edge. So the shorter the lens to closer you are to the subject and the more exaggerated things close to the lens get.
The other thing that you can notice between the two is the shadow cast by the handle. Look at the distance between it and the bag on the 50mm vs the 200mm. Shooting further away compresses (flattens) things down.
I grabbed a pretty sqaured up bag, so it's hard notice any other other difference between focal lengths, the edge of the bag looks much difference between the two, but that could have been due to the angle and height I was shooting at between the shots.
In the 50mm shot I was like maybe 3' away from the bag, in the 200mm shot--maybe 15'.
Now for lens sharpness. My Tamron 70-200 is a sharp $1100 lens:
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but it pales in comparison to a $150 prime:
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I need to double check my AF is accurate.
The setup was a just a single softbox directly above the bag pointed down.
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I did not use that umbrella light you see.