As the largest single drive in its class, the Seagate Barracuda 1.5 Terabyte 7200.11 hard drive offers performance equal to or greater than the Seagate 1TB drive. It only falls short in the access time portion of the benchmarking. With that being said, will you notice the difference in real life computing between it and the smaller 1 TB drive? No. It is slower than some of the comparison drives but the average read speeds are significantly higher across the board than the traditional hard drive comparisons. The SSD was included to show what the future might bring once the technology really starts to mature.