How does this compare to the newegg 240gb $139
SanDisk Extreme SDSSDX-240G-G25 2.5"
Which one is faster?
The SanDisk uses toggle NAND flash memory. To quote Hard OCP:
"this type of NAND is considered the premium NAND for SSDs because of its high speed and resistance to performance degradation"
The Samsung 840 uses TLC NAND, which is slower and less durable.