The big difference between the Trion 100 and the new 150 is the NAND, it moves from 19nm TLC from Toshiba to the new 15nm TLC but apart from that the drives are essentially the same.  Using TLC and making a minimum amount of changes gives a pricing benefit, The Tech Report saw the 480GB model for sale at $130, impressive pricing even for an entry level SSD such as this one.  Their testing shows performance improvements across the board compared to the Trion 100 in real life testing; though not enough to challenge the higher priced performance SSDs.  Check out the full review if you are in the market for a low cost SSD that will still net you some serious improvements over a HDD.

"With its Trion 150 SSD, OCZ takes another stab at a low-cost TLC drive by putting Toshiba's 15-nm NAND under the hood. We tested out this drive to see if it fares better than the Trion 100, OCZ's first TLC SSD."

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