Upgrade to dcs bartok.

My current system includes a simaudio 390 preamp/dac/streamer. Most of my listening is tidal and qobuz with roon nucleus. Rest of system is michi p5 amp(surprisingly good IMO) and sonus faber serafino speakers. Thinking of upgrading digital to dcs bartok. Obviously pricey upgrade. Thoughts on how much improvement would be gained? Obviously very subjective but just seeking input from anyone familiar with both simaudio and dcs bartok 

thanks