I have generation 2 SSD in one hand and a Vertex 3 in the other. Regardless of how I utilize them, the difference is overwhelmingly in favor of the Verterx3. It's not always about how quickly an app or game level loads but this is how must of us tend to judge it. Feel is also judged by how quickly we can move from one task to the next, whilst windows performs thousands of other IOP's concurrently to the drive. How quickly we forget how much other background work is accomplished by the operating system while we're gaming or whatever, the more efficient the drives and subsystem cope with this the sooner we move on to the next task.