The Bissell BG10 is a lightweight and compact machine that is easy to maneuver and transport, making it ideal for small to medium-sized homes or apartments. It has a tank capacity of 1 gallon and comes equipped with a multi-surface brush roll. On the other hand, the Bissell 86T3 is a heavy-duty machine that is built to handle more demanding cleaning tasks. It is heavier than the BG10, weighing in at around 25 pounds and measuring approximately 15 x 12 x 45 inches. It has a larger tank capacity of 1.75 gallons, and comes equipped with a powerful 12-row deep cleaning brush roll.