Is there really any difference between these two tubes???
http://cgi.ebay.com/Sovtek-12AX7LPS-12AX7-ECC83-pre-amp-tubes-NEW-/390013757609?pt=Vintage_Electronics_R2&hash=item5acea1a8a9
http://cgi.ebay.com/Sovtek-12AX7LPS-12AX7-ECC83-tubes-NOS-1999-New-/390164859271?pt=Vintage_Electronics_R2&hash=item5ad7a34987
Thanks.
http://cgi.ebay.com/Sovtek-12AX7LPS-12AX7-ECC83-pre-amp-tubes-NEW-/390013757609?pt=Vintage_Electronics_R2&hash=item5acea1a8a9
http://cgi.ebay.com/Sovtek-12AX7LPS-12AX7-ECC83-tubes-NOS-1999-New-/390164859271?pt=Vintage_Electronics_R2&hash=item5ad7a34987
Thanks.