His preamp uses a 6J5 tube which is essentially i/2 of a 6SN7. Giving this, I would assume that it would lean to that octal flavoring vs the smaller noval (9 pin) seasoning.
The octal preamps that I have heard tend to be more dimensional than a noval preamp with a somewhat fuller sound and I would expect the same from the 6J5 tube.
But without hearing it this is only speculation.
Might be a nice piece