My view on Ex-1000 vs ASG-2:
I do not think of ASG-2 as an upgrade from EX-1000 it is more of a side-grade. In terms of bass quantity ASG-2 offers more due to the bass port but in terms of comfort EX-1000 wins. However this is based on the assumption that we are listening in a quiet home area.
I need to say I use EX-1000 exclusively at home simply because of its non existing isolation. The two iem are not clone of each other as ASG-2 sound changes significantly by adjusting the bass port. But when the bass port is closed to my ears ASG-2 share the same sound as EX-1000 but with a little more bass quantity. The bass quality to my ear is a little better on EX1000 but that requires dedicated listening and quiet possibly perhaps that is matter of taste.
To my ears I find EX-1000 more comfortable for long term listening physically than ASG-2. ASG-2 is very easy sounding IEM that will not cause any fatigue however each ear is different and to my ear EX-1000 feels more comfortable physically. Sound wise well I have no problem with EX-1000 but than again I do not hear above 17 khz and ex-1000 seem to have a treble spikes that might be discomforting for some.
One strange thing that I have noticed on ASG-2 is the soundstage. For chamber music it is just perfect, it is incredibly open and 3D however at the same time I sense that it is way over-exaggrating things. While this tuning became a positive thing for chamber music for other genera it can become too unrealistic. Also for trance music I feel the dynamic driver is not fast enough but than again EX-1000 is not doing that much better however I feel EX-1000 is much better at dealing with trance music. So yes it is a good accident to have, this over-exggration seem to be impact the soundstage of the chamber music I listen to nicely, they add an echo that I like but sadly this tunning carries on to other genera of musics.
ASG-2 is not what I go for when I listen to rock.
As I said before the bass port of the consumer is not that useful, however it is a good option to have.