Heating function: K2 (Pro) heats cold water automatically; K1 only works with hot water for extraction.
Specification & accessories: K2 (Pro) fits 51mm and 58mm baskets with rich compatible accessories; K1 adopts 51mm size with limited accessories.
Operation: K2 (Pro) supports parameter adjustment via Bluetooth APP; K1 features basic simple operation only.
Battery life: K2 (Pro) has 13500mAh battery for more servings; K1 equips 2000mAh battery with shorter endurance.
Usage mode: K2 (Pro) only for ground coffee; K1 compatible with both ground coffee and capsules.
Position & price: K2 (Pro) high-end professional model with semi-automatic level flavor; K1 lightweight entry-level option with cost performance.