Yes an no the Beryl MT1300 uses NOR Flash 32MB and the Opal SFT1200 uses SPI NAND Flash 128MB the Flint AX1800 uses NAND Flash 128MB they are also on different kernels. Anyway the MT1300 and SFT1200 are updated by the GUI but AX1800 Needs uboot and it even states that on the firmware upgrade page.
Also Uboot should be updated
Uboot is simple if you follow the instructions.