The differences in the synthetic measurements are large, but they blur in the practical benchmarks. A fast and expensive SSD is only worthwhile if you also use it, for a simple office PC a cheap SSD with PCIe 3.0 is sufficient.
However, if you only look at the performance and only consider the SSDs from this test, you can hardly get past the Acer Predator; the Adata Legend 840 and the HP FX900 follow...