asahitoro, I can’t say how much better the 2i would be over your 2. The cost to find out isn’t exorbitant especially if you sell the 2.
What I can tell you is the 2i sounds really good in my big system. It is musically satisfying and fun to listen to. My cd playback is through a Chord Hugo. Analog via Origin Live with Quintet Black into my VAC phono. All three sources obviously don’t sound exactly the same. Each of the three are a good listen. IME if one source is markedly inferior to another, you find yourself gravitating towards the better sounding options. That said, while listening via the 2i I don’t experience the urge to listen to another source because of sound quality or engagement.
I really can’t find anything to fault with the 2i.