What's the difference between the Husqvarna DE 110 and the DE 120?

The main difference is their power and airflow capacities. The DE 110 is rated at 1.5 hp and and airflow of 124 CFM  (cubic feet per minute). The DE 120 is rated at 3 hp and an airflow of 241 CFM. The 120 DE is considered to be more heavy-duty, as it weighs an extra 30 lbs.