Your choice.
The PCIe will be more expensive, but faster.
If had the money, I'd skip both for the 480GB Fusion ioFX.
Almost no degrade, much faster, much more stable etc. And it's a very reputable drive.
Say hi to the next generation.Peace is a lie, there is only PassionThrough passion, I gain strengthThrough strength, I gain victoryThrough victory, my chains are brokenThe Republic of Gamers shall free me