Do insurance companies pass on the savings they make when they sell to you direct?

Some insurance companies have decided that they don't want to pay commission to car insurance comparison websites.  So, they advertise on TV and say that they will only give their price direct to you, the customer.  Do you really make a saving if you take them up on their offer - or does it end up costing you more?  www.ecarinsurancecomparison.co.uk  has the answer!