I just received my OriGen G2 today, so I decided to try and compare it to my ifi Nano BL.
I have to say that the OriGen G2 sounds cleaner and the Nano has a warmer sound. They both sound really good and I am sure others might hear something different as we all hear differently.
I love my G2 even though it’s plastered everywhere that it measures poorly. Use it with my laptop when I’m anywhere in my house besides my main listening desk. I wish more things had this type of form factor.