1) At around the fifth frame, notice how his torso is tilted (towards the right) a little more in '07:
2) At release, his shoulder plane is flatter in '07. A few frames after release his arm has finished higher, indicating a flatter arm path consistent with a lower slot. In the following image, I drew angles to show it. The two points I linked represent where his fingers are at release and where his hand ends up three frames after release:
The pitch on the left in '05 is not a sinker. It is (I assume, due to his much higher slot) a four-seam fastball with minimal lateral movement. His four-seam fastball is a strikeout/pop up type pitch. A pitcher wants hitters to swing over his sinker and under his four-seamer. The '05 pitch in clip two above is a "high, hard one." I see Zambrano throwing fewer pitches like this nowadays.
