Which SSD is Better?

Solution
I'd go with the Samsung if I had the money, but the Crucial is just as good.

The Samsung edges out the Crucial most of the time, just something to keep in mind.
SAMSUNG 840 EVO MZ-7TE250BW 2.5" 250GB SATA 6Gb/s 1x nm Samsung Toggle DDR 2.0 3-Bit MLC NAND Flash Memory (400Mbps) Internal Solid State Drive (SSD)
Or
Crucial MX100 CT256MX100SSD1 2.5" 256GB SATA III MLC Internal Solid State Drive (SSD)