Thought process of duplicates.....
I have two FWB300 variants. One with peep sights and one with a 4x fixed power scope. Sometimes irons are fun for 10m fun and sometimes the scope is fun.
Three Taipan Vets. A Short in .20, usually @ 19.5fpe. A Standard in .177, also at about 19fpe, and a Long in .22, usually in the 45-50fpe realm. The two at just shy of 20fpe are field target guns, mostly used by my two sons, although I enjoy them as well. The intent for the Long was Xtreme Field Target, and generally reaching out to 100+yards.
Considering that those five airguns (but only two platforms) represent more than half of my personal airgun collection.....well lets just say that indicates how I feel about those two platforms. Solid, dependable, tough, consistent, simple, solid/quality barrels, robust barrel-fixing methods, superb triggers, and easy to work on, etc etc, etc.
To summarize, it takes a pretty impressive platform for me to own more than one of it, and owning more than one of it means I can use each for various intended uses. Or in the case of the two 19ish fpe Vets, me and both my sons can all shoot at the same time.