CD-ROMs are less expensive, but also less up-to-date while network-based catalogs are more up-to-date but the data transfer to the user usually requires a higher financial effort.

In comparison with the data transfer via networks, the CD is a rather low-priced distribution medium. However, it must be produced and distributed physically. Current changes cannot be implemented unless the CD is revised and then reproduced.

Alternatively, the customers could get updated information separately, as is a common habit with paper catalogs - but this is hardly a desirable solution for an electronic catalog.

Catalog distribution via networks secures the ultimate timeliness of the data. The downside of this method, however, is the increased cost of the data transfer and the time you have to wait until the catalog pages are fully displayed on the screen.