What's the difference, and are they interchangeable?
No, they are very different.
One is just a lab and the other has weaponization manufacturing equipment like dryers, aerosol sprayers, and micron grinders (required for inhalation). Even in small sample quantities it has a rather large footprint, difficult to confuse the two as this is a significant different technical undertaking.
You have to create a way to target someone and deliver any biological agent into someone’s body. This takes a very large manufacturing and testing lab that usually will take place on a military base.
It is possible theoretically to Genetically target a population (person to person transmission) but you need something that won’t mutate and spread beyond a very genetic specific target, there are indications that the Chinese are interested in this but no one has found one .... they all end up mutating and end up killing the aggressor as well as the target.
Better yet they where studying how to make the virus attack people specifically with Slavic DNA. I’d have taken them out if I was of Slavic decent and caught wind of what they were doing.