PCMark 7 uses traces based on relatively modern software from the Windows 7 era. Because this benchmark uses modern real world applications, we consider it to be the most important benchmark (along with PCMark 8) for determining which SSD you should buy, assuming you're buying an SSD for consumer applications. One difference with PCMark Vantage, a benchmark which we no longer run for SSDs because it is simply too old by now, is that PCMark 7 plays the traces in real time. Because of this, there is less variance in the scores of SSDs, but the scores themselves are much more indicative of what you should expect in terms of actual real world performance.
Only the Samsung SSDs achieve more than 6000 points in PCMark 7. The differences are small, although it is clear that WD is unable to perform at the level of the other SSDs.
On the next page you can find the subscores.