So, I realized in my "box" of tubes, I did have a RCA NOS 6CJ3 hanging around.
I tried it in place of my stock Sylvania and did notice a difference in tone. The RCA was in fact a touch warmer and more melodic.
Interesting for sure.
I have procured a GE made Amperex ( for 10 dollars ) and will give it a try as well.
Thanks for your insights and happy Thanksgiving