”Stop. A vehicle may not pass the stop line or, if there is no such line, the signal unless it has come so far when the signal changes from green to amber that it cannot stop without risk.”
If you are driving at 50 km/h and it changes from green to amber when you are three metres from the lights, it would be impossible to stop in time. Panic braking can cause a very dangerous traffic situation.
”Stop. A vehicle may not pass the stop line or, in the absence of such, the signal. A signal with an arrow outline only applies to the direction or directions indicated by the arrow.”
They therefore do not have exactly the same meaning.