I saw that a higher capacity SSD is faster than a lower capacity one I have some questions - what is the speed difference and is it noticeable during normal use, or only when copying large files? - is it worth upgrading capacity just for this speed difference? - in other words will paying $x for a 512GB SSD give similar speed boost to paying $x (same amount) for 0.3Ghz more processor, for example - i read something about the 256GB PCIe-SSD having 2 lanes and the 512GB one having 4 lanes. what does this mean and how does it affect performance? thanks ---------- sorry for not mentioning, i am talking about the new Mac Pro, and the Apple (preconfigured) SSD thanks.