Thank you for the replies. I can tell each kit has details on every.
The Amazon board is a MAX II device, while the other boards are MAX10, although without SDRAM I can see how the Kamami board becomes a bit more limited. The Arrow board, however, has a built-in Blaster programmer, although a standalone one is not expensive.
asmi, SDRAM is an encompassing term for everything Synchronous Dynamic RAM, including their newest incarnations DDR3/4.