Cuprajake MWJB
I’m not disputing the value for money but it’s clear that geometries absolutely result in repeatable and consistent differences. It’s great that the Duo will make swapping out burrs relatively easy for precisely this reason.
If the Mazzer filter burrs only provide a coarser grinding range over their espresso counterparts then it’s a bit of a wasted feature out of the box, but it will be a big draw for those who don’t care about cost and want to switch between other burrs with other flavour profiles like for example the upcoming 83mm lab sweets.
The cutting pattern differences between Mazzer 151As, SSP 83 HUs, K30s and other big espresso burrs aren’t massively different so the flavour difference not as pronounced compared to say the low fines geometries you see on the MPs, ProM or Kenia. Not saying smaller particle distributions are objectively better but they certainly taste different, have less of an espresso dialling in range, etc.