drdre89 very straightforward with all Mazzers, SSP, DF and Gorilla Gear. Can’t say the same for Ceado.
Still to try Fiorenzato and Compak but not holding my breath with them, based on how different their burr sizes are from all the others in the 64mm range.
Favorite 83mm burrs for staright espresso so far in the medium/light to medium range are the Mazzer k151H.
Hard to beat SSP Espreso (HU) for light if you like a bright vibrant espresso.
But the stock 151B burrs will keep most people quite happy for the full range of roast depths. A very smooth espresso.
(Big fan of the stock 151F for filter but bear in mind I’m newish to filter.)
But yes, all those burrs in the first line fit the Duo cartidges I have just fine. Be mindful that you may run the risk of voiding your warranty by using non stock burrs.