Both are shaped by the customers, technology and applications. The occupational profile of employees drives computing demand. Professionals devour computing capacity whereas craft labor hardly uses any. The penetration of computing will also vary. It is extremely high with engineers and the accounting types, much less with technicians and salespeople.
Mobile workers require less computing than sedentary number crunchers.
Computer literacy also matters. Employee turnover places enormous burdens on the support staffs for hand-holding, training, error correction and equipment relocation. That staggering instability must surely increase the costs of all support. Technology architecture and adherence to standards also influence costs. The choice of the identical versions of applications and operating systems greatly simplifies diagnostics and network maintenance.