Well, the S.E.5a and the SPAD XIII were very strong designs, and their inline engines provided them with
greater speed than any German design had.
But definitely, a better education for fighter pilots was, what made the Germans superiour early on,
and what the Allied later caught up with. That, and the sheer numerical superiority, made it a lost case
for the Germans.
But what makes me really sad - and really angry - is the refusal of parachutes for the flyers, simply because
one feared that they would abandon their damaged aircraft too easily. The Germans later ONLY got them,
because the qualified pilots became more and more rare. How cynical that is!