There are several differences, besides generally being more expensive a fumigation requires a ton of work by you before the tent even goes up.  Here is a sample: You must bag or remove all fresh or opened food, open all drawers, cabinets, closets and doors, remove all plants and pets, remove or bag all medicines and personal products, bag or remove anything that you may ever ingest in the future, clear a 2-3 foot area around the exterior of your home and soak it with water, arrange for your gas to be shut off the day before and re-connected the day after your fumigation, leave your home for 2-3 days and mentally prepare for a few broken roof tiles as workers must walk on your roof to properly hang the tent. All of this and the moment the tent is removed, there is nothing to stop flying termites from re-entering your home. Fumigations also do not treat subterranean termites which is one of the 2 types of termites CA homeowners usually deal with. Our “No Moving Out” termite treatment Kilguard covers both drywood and subterranean termites.