850 Pro will be faster at sequential file performance, and low queue depth performance. the Blade will be faster at small file performance and destroy the 850 Pro at deep queue depth scenarios.
Translation: large cache of the Samsung 850 Pro helps poor controller to get speed in sequentional tests, while when things go random (small files) or deeply multitasked (deep queue), then G.Skill Blade will kick a$$, thanks to powerfull controller chip? 
And any ideas about the SanDisk suxxka? I can try it out only on relatively slow computers, so it is hard to say how it will perform on more up-to-date hardwareÂ
I mean… it is of a little point benching SATA3 SSD on original SATA(1) controller with poor performance. The results are only "for the LULZ":

You will probably agree that comparing SSDs on such computer are worthless. Except for fun it is not good for anything else, much less for comparsion.