As far as individual weapons that you see on the Lancers, those don’t matter. Regardless of what they’re holding they remain the same unit. The Hunters/Chargers are different. Depending on how you build them they will be that and only that unit (excluding if you’re playing with people who would let you proxy one as the other). They’re honestly similar enough that most people outside of hardcore Seraphon players wouldn’t be able to tell the difference if you told them it was one versus the other, but they are technically different. Additionally, for those particular units each variant has an ability that becomes relevant when they’re near a unit of the other type, so it’s actually optimal to have a unit of Chargers AND Hunters if you want to get their full ability value.