The simple answer is the different policies provide you with different coverage and maximum amounts you can claim for.
Please see below the table of benefits which details the maximum amount you can claim under each section of the policy for the Bronze, Silver and Gold cover.
Unless a policy with the excess waiver is purchased the excess will be deducted from any claim refund amount.
For a cancellation claim, the insurance premium purchased will also be deducted from the final claim refund amount.
The below table is detailed on the insurance policy documentation that you can view here, at the time of booking and that will be issued after purchasing insurance on your NUCO booking.
We highly advise you read the policy documentation before deciding which policy is right for you. Each section detailed above has explanations, inclusions and exclusions detailed in the policy document.
All our policy documentation can be found here.