The exterior adjustment design of the K4 and the K6 has made the adjustment design visible from internal to external. You don’t need to remove the receiver to set the desire grind size. You would comprehend the exterior adjustment mechanism of the K4 and the K6 after reading this post. The grinder’s component parts of the exterior adjustment design. The comparison of the K4 grinder and the K6 grinder. Both are premium manual coffee grinders from KINGrinder. The grinders look like twins, they shared the same weight of 600+g, the same exterior adjustment design where 60 clicks per round, the same hopper volume of 3035g, the shape of the conical ball. It is unable to recognize which is which without looking into it. The quickest way to identify the grinder is to remove the receiver and caught a glimpse of the burr set. The burr set of the K4 grinder is Titanium-Coated Burr whereas the K6 grinder is Stainless Steel Burr. The major and only different is the burr set design. The burr set design could affect your decision of purchasing the grinder. The K4 grinder is tailor-made for the espresso. The Titanium-Coated Burr design. The exterior design of 16? M. The K6 grinder is the ultimate grinder of the combination for the functional features and the affordable price range among the industry. It is able to grind several methods. The Heptagonal Stainless Steel Burr design. The K4 grinder is the espresso grinder whereas likely to taste the sweet flavor with the medium and dark-roasted coffee beans. The K6 grinder is a versatile grinder capable to grind various coffee, it could taste the sour fruit flavor on the light-roasted coffee beans. My favorite grinder is the K6 for pour-over. I personally favor the K4 grinder for espresso, the burr design is just perfect for it.