According to Intel's part number decoding guidelines, the suffix at the end of the part number typically indicates optional information, such as package type or delivery method:
"N": Usually indicates RoHS compliant and a standard product.
"FA": This is an optional suffix that may indicate a specific factory package, pallet quantity, or a custom part number used to differentiate specific sales channels or customer requirements without changing the chip's functionality or electrical characteristics.
In short, the "FA" suffix may only affect procurement and logistics details, such as the quantity of factory packages, rather than functional differences in the FPGA.