The thing that I'm not sure about is if having an additional 44.1kHz clock has a noticable impact on DAC performance that can be shown on Jitter graphs to name one example.
Noticeable? Taking into account how modern measuring equipment is precised I wouldn't be surprised if it would be noticeable. But even if the difference can be measured there is a question if it can be heard.
I am, of course, aware that there are guys on different forums claiming that they can hear a difference when they swap a SPDIF coax cable or power cable but I was referring to the human beings with normal, not supernatural, hearing.
The question you posted can be extended to many aspects of the DAC/preamp design, like for example having separate transformers for digital and analog stages (like found in Gustard X20 Pro), or having discrete analog stage vs the one with opamps. In fact, now when I mentioned X20 Pro, I would be very interested to see how the X20 Pro compares to the Topping DX7s in measurement and especially in listening test.