Are your attachments hitting the bottom of the bowl? Are they leaving unincorporated ingredients at the bottom, causing you to incorporate by hand? This article will walk you through adjusting the beater to bowl height in a few easy steps. https://www.kitchenaid.com/countertop-appliances/pinch-of-help/how-to-adjust-stand-mixer

Were you ever curious at why two mixers virtually identical and even with interchangeable attachments and bowls, are labeled differently? Read this for further understanding of the Artisan and Classic comparison. https://www.kitchenaid.com/countertop-appliances/pinch-of-help/classic-vs-artisan

This KitchenAid article spells it out for you. What attachment at what speed for what purpose. Can't go wrong using the manufacturer's recommended guidelines. https://www.kitchenaid.com/countertop-appliances/pinch-of-help/stand-mixer-speeds