In regards to the first demo (phwh.dem) how are these shots aimbotted when the view angles are exactly the same, therefore there is absolutely no shake whatsoever while spectating? Not to mention that if you take a closer look at bullet decals, you will see that half of them land near the enemy's model without any specific patterns that would hint an aimbot. Kill on suicide alley (underneath T spawn ramp, last kill of first round) is legitimate, since there are already shots fired at that spot and pretty much every CT knows the T's location.
In regards to the second demo (aimbotphena) the shot is merely lucky. I just quickly snap my crosshair and happen to land the shot. If I had a vector-based aimbot I would miss the shot. If I had a silent aimbot, I would shake in spectator mode, since you can't manipulate the spread without sending false information to the server and thus shaking blatantly.