I doubt if there are many that have listened to both units modified.
I have the Touch and it was modified by Bolder, I also bought the Bolder Linear power supply. Both were very positive upgrades over the stock Touch.
I also tried the Monarchy Combo DIP's and found that they had no effect with the Touch. So, I guess the Touch's Jitter is lower than the Monarchy units.
Never heard the Sonos units, but I am enjoying the modded Touch playing digitally through my Cary Pro Dac.