I was just wondering what the difference between the two were. From what I can tell from looking at them, it looks like just the soft ears? Regardless, can I swap out soft for the hard on an i3?
No you cannot swap the ears on the pro to the regular i3. The plastic on the mask is cut in a way so that the soft ears can fit on the pro. The i3 pro is slightly lighter than the i3 and the soft ears are great.
Much better than the regular i3. Loved my I3 pro before it finally fell apart and parts were impossible to get.