Your existing Vincent phono seems like a true Gem with a lot of versatility.
So, just a bug to change something, I suggest you try a different cartridge.
If you decide to try another tube phono, you might consider a tube preamp with MM phono, and use a SUT into the preamp's phono. Then you can compare your Vincent to the Preamp's phono.
I always advise flexibility for current and future cartridges, this Jolida is very versatile
https://www.jolida.com/product/jd-9-ii-phono-preamp
One currently on eBay
https://www.ebay.com/itm/Jolida-JD9-II-Tube-Phono-Preamplifier-w-Preamp-Upgrade/254895432383
So, just a bug to change something, I suggest you try a different cartridge.
If you decide to try another tube phono, you might consider a tube preamp with MM phono, and use a SUT into the preamp's phono. Then you can compare your Vincent to the Preamp's phono.
I always advise flexibility for current and future cartridges, this Jolida is very versatile
https://www.jolida.com/product/jd-9-ii-phono-preamp
One currently on eBay
https://www.ebay.com/itm/Jolida-JD9-II-Tube-Phono-Preamplifier-w-Preamp-Upgrade/254895432383