The following graph shows the total performance rating of the NAS in comparison to other units. The comparison is pretty straight forward: the tested unit is shown as 100% and all other units' performance is relative to it. Please note that the graph below only measures raw performance and doesn't account for any available features or the unit's functionality.
For most of you, the following graph is the most interesting because it shows the performance per dollar of the NAS you may consider buying. We looked up the current USD price of each NAS on the popular online shop Newegg and used it along with the relative performance numbers to calculate the Performance-per-Dollar index. If Newegg didn't have a specific unit in stock, we searched for it at other popular online shops (e.g., TigerDirect, Amazon) and, finally, if the unit was not sold in the USA, we searched for the product at popular EU shops (e.g., Caseking) and then, if found, converted its price to USD (w/o VAT).