It depends on the interface. Flash is the medium for the technology. But the interface can make a big difference in the speed of the device.For example: Majority of Android phone have used a standard protocol called eMMC which is now i have at 5.0.Samsung is moving towards their format UFS.. According to Anandtech - it is perceived and theorized that Apple is using the PCIe protocol with NVMe which is closer to what newer SSD systems are or will be using. (Apple already uses PCIe interface for their macbook like).
Other hard drive manufactures use SATA. The interface and it's controller makes just as much of a difference than the actual memory instead.