I'm not sure what you were expecting to see here. Virtually any DSLR from any company, and virtually any mirrorless from any company is probably going to fare well in this test. You've selecting something that isn't the sweet spot of either camera, and something that isn't hard to do by any camera, as a point of comparison.
If you want to test these two against each other, I'd maybe compare bird in flight images of small birds, requiring some cropping to match focal length of the glass vs. indoor extremely low light action shots. I expect you'd find the 7D excels at the first scenario and the 5D3 excels at the second. I bought the 5D3 primarily to do indoor sports, and as a general use camera. If I was primarily a birder, I would have probably bought a 7D for birding and as a general use camera. You don't compare in the general use case.