"Workstation" is a marketing term. A way of ballooning prices of sub components of same class for generally slower (but marketed as more stable) results. Sell them to the enterprise at twice to 3 times actual fab value and a larger support warranty.
I'm with Tess that the only thing we can distinguish these days is whether i7 or Xeon or FX or Opteron, etc. ECC is nice but slower. Chipsets are generally the same. Power is not always the end goal. I don't need a workstation. I don't do CAD or 3D. Those are the disciplines I think of when Workstation get's thrown around. Video not so much, Audio even less. Never had an i7 be more or less stable than a Xeon. A core 2 vs. Itanium. But it is nice to 'feel' like I have something better, more punishment taking/ longer lasting. But in the end you can do whatever with whatever crunches those 0's and 1's relatively fast. The rest is ego ("I'm a pro!"), desire, consumerism.
I'm with Tess that the only thing we can distinguish these days is whether i7 or Xeon or FX or Opteron, etc. ECC is nice but slower. Chipsets are generally the same. Power is not always the end goal. I don't need a workstation. I don't do CAD or 3D. Those are the disciplines I think of when Workstation get's thrown around. Video not so much, Audio even less. Never had an i7 be more or less stable than a Xeon. A core 2 vs. Itanium. But it is nice to 'feel' like I have something better, more punishment taking/ longer lasting. But in the end you can do whatever with whatever crunches those 0's and 1's relatively fast. The rest is ego ("I'm a pro!"), desire, consumerism.