Think preferred, not better.
I did not prefer the Phono stage of my McIntosh C28 SS preamp. I do prefer the Phono stage of my McIntosh Tube Tuner/Preamp mx110z. Love it.
MC: I recommend going low output MC to SUT, then begin with the existing Phono Stage in existing preamp.
SUTs are Passive, simply transformer windings, should be no change in sound, so your existing MM Phono stage ought to sound the same, it is the cartridge's sound that makes the difference.
Buy used, vintage, or new SUT, if new, get RETURN OPTION.
Next, try a new separate Phono Stage, it will need to do RIAA eq and signal boost up to line level to Preamp.
Buy phono stage from a source with RETURN OPTION.
.................................
SUT, Options?
Considering new cartridge, and plan for future MC cartridges, I always recommend a SUT with optional settings (various magnification xFactors/various impedances.
I chose Vintage Fidelity Research FRT-4 (pass, 4 x factors, 3 tonearm inputs
I see the Entre 100, black or silver with similar features
When you get your short list of MC cartridges, ask again for opinions here, and then ask opinions on your short list of Phono Stage and SUTs.
The SUT technical factors need to have an option that is good for your chosen cartridge