All handheld AT weapons do deflection damage, I don't see why you see the need to name just specifically these two as if it was some kind of unique benefit to them.
Its not only damage that is 50% lower, its penetration as well, especially in context of armor difference.
Reload and accuracy only partly make up for that.
Point still stands, shreck is a superior weapon and it shouldn't be on squad with superior durability.
I did not present as "unique benefit" but allied weapons benefit more from it.
Deflection damage reduces the benefits of high armor since it will cause damage if it hits. Deflection damage on shrecks hardly ever kicks in since they will usually penetrate allied mediums.
The damage is simply not lower by 50%.
When you use actual numbers you create the impression that it is based on stats while you have little to support a theory that allied weapons are "50% weaker AT weapons". Allied AT weapons have different power levels thus the claim is wrong and it also misleading.
P.Fusiliers (especially 5 men as suggested) do not have superior durability to allied infantry with access to hand held AT weapons.