What I have pointed out so far is that Shock where not designed to better grenades as claimed.
And you have failed to note what others have already pointed out, that there is NOTHING in years of changes to the unit that says they are not supposed to be better.
On pair, as again, noted multiple times does not mean carbon copy, it can mean stronger, it can mean weaker, it can cost more, it can cost less.
You know, like all stock med tanks are on pair with each other short of T34.
If it means stronger in this particular case, there is nothing wrong with it as the unit deals less DPS and got much weaker infantry standing behind it in the context of other armies and their SMG troops.
As for "specialist" the closest thing to Shock troops are ranges/smg paras who use the cooked grenade that is inferior to shock's grenades
Different factions, different units, different stats.
Both of them have stronger weapons, shocks can't even dream of DPS thompson paras can pull.
Both of them also suffer much less from DPS loss per model as they have less SMGs then squad members and rifles are nowhere near that DPS.