Reading the information in the Link, the Pre appears to be a Clone based around a Kondo Design.
Whether the Kondo and this Design Purchased are anything like each other in SQ might not be discovered.
The Info on the Phonostage is quite limited, so that if used will have to be a suck it and see affair.
As for Retro Japanese, the designs usually lean towards a richness in a presentation.
If not controlled it can have a Weighty Bass to Overwhelming Bass Bloom, either of these present, can produce a Subdued Mid and High.
Looking at the 6N23P EV these types are known to not over emphasize the Frequencies when assessing for SQ.
The user reports are that these Tubes are usually performing as very well balanced throughout the frequencies.
Maybe (an assumption) the Pre's Builder has chose to use Tubes that are going to be a little more lean and balanced in their presentation,
resulting in offering a tighter Bass Note that will be a little more transparent.
I'm sure the reports on usage will reveal the SQ of the Pre'.
If Tube Rolling is off interest, the 6N23P and 6N23P EV are a little different and are not direct swaps.
I discovered this as I was looking to extend a Tube Roll on a Phonostage to 6N23P Tubes vs 6922 and E88CC.
Whether the Kondo and this Design Purchased are anything like each other in SQ might not be discovered.
The Info on the Phonostage is quite limited, so that if used will have to be a suck it and see affair.
As for Retro Japanese, the designs usually lean towards a richness in a presentation.
If not controlled it can have a Weighty Bass to Overwhelming Bass Bloom, either of these present, can produce a Subdued Mid and High.
Looking at the 6N23P EV these types are known to not over emphasize the Frequencies when assessing for SQ.
The user reports are that these Tubes are usually performing as very well balanced throughout the frequencies.
Maybe (an assumption) the Pre's Builder has chose to use Tubes that are going to be a little more lean and balanced in their presentation,
resulting in offering a tighter Bass Note that will be a little more transparent.
I'm sure the reports on usage will reveal the SQ of the Pre'.
If Tube Rolling is off interest, the 6N23P and 6N23P EV are a little different and are not direct swaps.
I discovered this as I was looking to extend a Tube Roll on a Phonostage to 6N23P Tubes vs 6922 and E88CC.