Tool/software:
Q1) Meaning of package marking differences
I noticed a difference in the package markings between the two photos of LP2985A-33DBVR. Could you please explain the significance of this difference and the criteria used?

Q2) Verification of genuine and counterfeit
Would it be possible to verify the authenticity based on the label photo below?

Q3) The product in the left photo of Q1 outputs the correct voltage, while the product in the right photo outputs 0V. Is this due to a design error in the circuit, a performance issue caused by the difference in package markings, or could it be that the product is counterfeit?