I don’t really understand what you mean.
On all other class of modules (e.g. shield extenders, armor repairers, energy neutralizers, ecm …) you have one or more skills influencing the stats of the entire module class, so equally for t1, t2, faction.
All turrets, launchers and damage drones on the other hand have a special skill which further increase the damage output of T2 versions. I just realized that I should count Drones as well, even though they’re not a module.
Faction T1 Drones give quite a meaningful advantage over using T1 whereas using faction guns seems a rare choice at best, as their stats don’t offer much advantage over Meta 4 guns and in many cases even some disadvantage in fitting requirements, making them barely usable for new, non-T2 players.
Unless you have the rare case of someone training Advanced Weapon Upgrades to V before getting into T2 guns.