A: Pin-to-Pin compatible form fit and function.
A/Upgrade: Pin-to-Pin compatible form fit and function with better performance in specific parameters.
A/Downgrade: Pin-to-Pin compatible form fit and function with slight inferior performance in specific parameters.
B: Pin-to-Pin compatible form fit and function with minor electrical and/or packaging dimensions.
B/Upgrade: Pin-to-Pin compatible form fit and function with minor electrical and/or packaging dimensions with some better performance in specific parameters.
B/Downgrade: Pin-to-Pin compatible form fit and function with minor electrical and/or packaging dimensions with some slight inferior performance in specific parameters.
NIC: Closest Equivalent Identified. Further review may be required.
