Too hard to say. For example the older CJ tube amps and preamps provided a very musical sound but some might say to much syrup if you understand that. So it depends on the design. I am in the camp that says the preamp makes the sound because it reproduces the soundstage dimension, sorts out complex passages, separates the space between instruments and vocals, creates the texture of the piano, strings and sax, notes. IMO the amp does not influence that part as much as the preamp. I would imagine that not one person replying to your post has ever heard a Direct Heated Triode produce or built and designed a component or modified a component. So their experience in mainly based on hearing a component in their system, another persons system, at a dealer, or at a show. So that seems limiting to me just my opinion don't lay me out people just trying to provide some advice on the questions asked.
Happy Listening.
Happy Listening.