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Reporting question for Vacuum Tube - 12AX7, Tung-Sol Reissue

Product:
Vacuum Tube - 12AX7, Tung-Sol Reissue

Question:
What is the difference in gain and tone with the ecc83 and ecc803s (gold pin variation of this) and why isn't the gold pin listed as an ecc803s when it is on the box/label?