I mean they aren't. People swear by this guy and how he grades keepers and hes specifically praising de gea sitting back and waiting yet you still can't just sya great save without some caveat
They are different, Benzema has more time and space to work with considerably more infact. Barnes has to take the ball while sprinting under pressure and get the shot off. Benzema has time to take a touch set himself and decide how best to go forward.
De Gea's is a good save to fairly average finish from a fairly average finisher, Barnes just goes for power and gets it to close to De Gea.
Allison does sell himself a little (that's always the risk with being so proactive) but Benzema makes a difficult finish look very easy because he is one of the Best strikers in the world right now. Harvey Barnes isn't.
Still good save, good positioning spread himself well gets a strong hand on it. Does everything right.
Allison doesn't get it right on this occasion but it was complete mess from start to finish from the entire team aswell and they just all end up all over the place.