You are talking about weapons for night patrolling, hit and run raids to cause consternation and capture prisoners. I believe we are talking about your average Tommy and your average Fritz fighting backward and forward with issued weapons.....also the average soldier was quite ignorant in the sense that there was very little information about what was happening. If your mates told you something was bad, you generally believed them and I can truly say having handled one, the saw back bayonet really comes over as bad. I was amazed at the weight and the sharpness of the cross cut saw teeth.
I suppose another analogy is the sniper - if you were caught with a rifle with a telescopic sight you would not be taken prisoner while the guys around you with ordinary rifles would. There's war and there's killing - in a strange way there's a difference. It's always makes you think when you see victors sharing food, drink, cigarettes etc with recently captured enemy. All in the same boat and after "fair fight"
Anyway back to the piccies...