I do like the 6V6 sound and used to own quite a few amps & receivers with them, although I no longer own any that uses them . From limited listening tests on modest equipment I noticed some small differences as listed in this thread.
You might try doing a search here for prior threads on this topic such as this: http://audiokarma.org/forums/index.php?threads/best-6v6-tube-for-audio.403618/#post-5125945
You might try doing a search here for prior threads on this topic such as this: http://audiokarma.org/forums/index.php?threads/best-6v6-tube-for-audio.403618/#post-5125945