Well, I am gonna give you THE answer to this question but you may not like it ,if you really want to know your going to have to try it for yourself. Everyone hears differently and the differences between dacs are subtle enough that some people will not notice any differences.
Inevitably this thread and others like it will be filled with people who think it sounds way better than the Modi, people who cant tell any differences at all, and people who demand that first group do a quadruple blind test inside a Faraday cage to prevent the psychic emanations of the administrators from influencing the participants. It will all be extremely confusing and that burning question wont be fully answered.
Schiit has a great trial policy, if you dont like it or cant tell any difference with the Modi you can return it. You will lose 30 bucks plus shipping but for me at least it would be worth it. If you get lucky you wont be able to hear any difference, return it and feel satisfied that the Modi is all you will ever want/need. Might even save you from buying a even more expensive dac in the future that you get stuck with. If you do hear a difference and like it better then you get to experience both the thrill that all your music now sounds better and the sound of your wallet crying.
What you will definitely get is a much better usb interface and a xlr output enabling you to eliminate any ground loops should they arise along with double the power output. Both of those are handy to have, and in my opinion the Modi's greatest flaw is its lackluster USB interface which the Modius resolves and then some. Those Cmedia interfaces are getting quite dated and lag behind Xmos which is what seems to be used most often in the better dacs these days. Rather it will be an audible improvement or not I cant say but it it certainly helps the old OCD.
I ordered one to go with my Asgard 3, I actually didnt really like the Modi with the Asgard so I am curious to hear if there is a improvement myself compared to a Creative G6. I will be glad to be rid of these crappy Creative drivers at least.