KitchenAid mixer comparison chart.

I found a great KitchenAid mixer comparison chart:

https://mixitbakeit.com/compare-kitchen-aid-stand-mixers/

Lists all the main features such as gear type, wattage, HP, bowl size, warranty.

Of note:  The 5 qt and 6 qt models have a 1 year warranty. The 7 qt model has a 5 year warranty.  The commercial 8 qt model has a 2 year warranty.