All of the items listed above are perpetual licences therefore giving you the benefit of owning the product outright. The minute you purchase the product it is effectively out of date and to ensure you are current you want to have a product that is updated the minute updates are made available. By buying a subscription licence through the Creative Cloud for teams offering you are giving yourselves instant access to updated software.
Additionally, with the perpetual licence options you have to consider which suite is right and ensure that you have opted for upgrade plan and maintenance and support. With the Creative Cloud for teams offering this is all taken care of – with only one product that includes the equivalent of upgrade plan and maintenance and support.