There is a difference. One is strategic, one is tactical. One lays the foundation for the future, the other sweeps the past under the rug.
There is a move (again) in technology that pits consolidation as the be-all and end-all of tactical maneuvers in the data center to reduce operating expenses. The hue and cry is not surprising. Many of us have seen it before. An onslaught of technology in the forms of solutions and services rains down upon the data center, promising to solve this pain point and the next. Eventually, overwhelmed by the unmanageable number of devices, appliances and servers needed to support all these disparate solution, consolidation arrives on a white horse to save the day. Get rid of all the boxen! Save money on power, on cooling, on management. Simplify your architecture!