I find anglo and duet no more alike than guitar and banjo. Sure, they both look similar-ish, and they've both got strings that resonate at different pitches when you finger different frets ... but that's the end of the similarities. Different arrangements of buttons / strings, different tunings for the buttons / strings, and different playing techniques (nobody really frails on a guitar or strums a banjo with a pick unless they're intentionally doing something very unusual).
I use a similar analogy when folks ask if my concertina is a kind of accordion. “They’re related, but only in the same way a violin is related to a banjo."