The Mahlkonig PEAK is designed for espresso grinding while the EK43 is more universal and can grind anything including filter coffee, espresso, and Turkish coffee. The PEAK has a broad range of espresso settings and features that make espresso grinding faster and more efficient without sacrificing quality. If you need a grinder to grind retail bags of coffee, drip coffee, pour-overs, and Chemex coffees, a retail grinder like the EK43 is ideal.