5AR4/GZ34 Rectifier Tubes

I have two Sylvania 6SN7GT Badboys from '52 and a 1940s Tung Sol 5U4G, both from eBay. Terrific combination. Kind of expensive, nevertheless...

I just got a matched pair of Ken Rad 1942 6SN7GTs on eBay for back up and am planning to send off to cryo lab ASAP. I figure, what the heck, why not?

Wig, thanks for the info but I am under the impression from what I read on the www that the early Ken Rads are the King of Bass. My current Sylvania Badboys are not bass shy. It is a wee bit peculiar that there are often conflicting opinions on tubes in general, but it is especially odd that it's hard to get consensus on these expensive 6SN7 tubes. You pays your money and you takes your chances.

That's interesting. Pardon my ignorance, what are Sylvania Bugle Boys?

So, all of this begs the question, which is better the early '40s Sylvania VT-231 or the later early '50s Sylvania 3 hole 6SN7GT? My understanding is that the "badboy" is sonically very similar to the VT-231 but without its bass shyness. So, the question is, is the VT-231 superior in other ways to the "badboy." Air, high frequency extension, smoothness, etc.