Mass produced appliance vs. artisan machine. Smart Grinder Pro is a game changer as far as features at a given price. But a lot of plastic in its construction. Really about the type of coffee brewer one is. ROK is about a hands on (literally) connection to the coffee. For Espresso, we’ve found the stepless grind adjustment of the ROK gives finer control over extractions. The SGP has limited adjustment in the espresso range. In most cases users will have to control extractions with dosing rather than grind size adjustments. Yesterday we put a ROK up against a Baratza Vario [More]