What's the difference between "UPD70F3421GJ(A)-GAE-E2-QS-AX" and "UPD70F3421GJ(A)-GAE-QS-AX"

What's the difference between "UPD70F3421GJ(A)-GAE-E2-QS-AX" and "UPD70F3421GJ(A)-GAE-QS-AX"