There is no differnce in cost for either managed or unmanaged, other than possible charges described in unmanaged hosting.
Managed hosting – we will look after the running of your hosting back office beyond the initial setup. This could include extra email addresses, email forwarding, installation of Apps are a few examples.
Unmanaged hosting – this is for customers who wish to manage their hosting package completely, beyond the initial setup. We may apply a charge if we are required to assist with issues relating to unmanaged hosting, user error.