When you see the SSD type (the flash memory used inside), there are two types, one is SLC and the other MLC. AFAIK, MLC can store doubled value in same segment, on the other hand SLC only can save one value in the same segment.
When you compare these two types, SLC is MUCH faster than MLC, but it requires more silicons to be placed, thus more expensive.
Go check the SSD detaile page, you can see if it's using SLC or MLC. I believe all Intel SSDs are SLC types. Maybe not.