The comparisons are ill considered. This is a completely different shooting as it's entirely on video.
Yeah, except it's NOT entirely on video. The altercation took place over 2 minutes and some 200 or 300 yards, and very little of it is actually caught on video.
I don't know how it changes anything. The victim was still running away and posed no threat to the officer or to anyone else in the vicinity when he was shot -- in the back.
Based on the frame clock on the video, the two go from struggling to breaking contact, Scott turning and sprinting while Slager draws, aims, and starts firing, all in under 2 seconds. 2 Seconds ain't a lot of time to react. From break to the final shot fired is about 4 seconds, which still ain't a lot of time.
Do you honestly think you could react better, under stress, immediately after a fight, under those time constraints? I'd like to think that I would, but I'm honest enough to admit I can't be sure.
Hell, I struggle to reliably draw, aim and fire in 1 second under relaxed and controlled circumstances. Add stress, fear, fighting, adrenalin, decision making, having just sprinted 200 yards, possibly having just been tasered by my own taser... No way I could say I'd perform any better.
Also, let's be clear about what the video shows and doesn't show. For instance, it does not show who else might have been in the vicinity, nor who else might have been at risk.