Well i only EXT since yesterday. Which is part of UK VE tour organised by
@PhilW from Audio Conciercge. So big thanks to him for allowing me to participate! And big Kudos for organizing such rare, but much needed events in UK.
All i can say they are both excellent in they own way.
Just to note i took Indigo off sales as i realized almost too late how good they are.
In General EXT is a very tastefully done V shape. Where as Indigo is a slight U shape.
EXTs have midbass focused without rolling off subbass. Its slighly bassier too.
Indigo is subbass focused without loosing too much warmth in midbass.
Mids are taking a small step back on EXT. But i tried some tips that calm down bass slightly allowing mids some space.
Indigos have full bodied lower mids and more presence in upper mids. So is a bit more linear. Both are well suited for people sensitive to upper mids with EXT being a better pick. While Indigos mids are not going to push anything back.
Treble is actually really really well done on EXT. No peaks, no scoops. Well extended, its briliant. It sits well in contrast with bass. Not letting EXT sound dark.
Indigos up to have slightly toned down lower and treble and there is a slight roll off at top end. But funny enough i fell in love with this kind of tuning as it sounds so natural and effortless.
They are both excellent in treble while having a bit of different flavour. So will come down to preference.
Soundstage and imaging wise. Well EXT will not win awards but this is relatively speaking in TOTL segment. It has great width and good separation. There is definitely nothing bad about it. There plenty iems in this price range that are far worse.
But here Indigo, being helped by bone conductor, is just a firework show in comparison. Its imaging and space between notes is clearly distinct. Width wise they are comparable. But Indigo has better depth and height also separation is better in midrange.
They both hide nothing when it come to resolution. But EXT will satisfy people who enjoy upper treble sparkle with EXT more. Where indingo will have upper hand in entire midrange.
Also in regards of bass speed. I see nothing too slow on both here. They are different presentations but they are quite tactile for DDS. I think we need to be realistic here. Its not a BA bass or a BA wannabe Berylium DD bass of A8000.
But yes Odin and EVO are faster than both. Or any DD out there that i have heard.
Ergonomics wise EXT is a click in fit where i could probably do burpees with them and they still would stay in my ears. But this also mean this kind of tight fit might not be for longer period. Will need to find out. I do feel like it might not work for small years.
Indigos improved fit over MkII significantly so there is no complains about it. I wear them sometimes for 4hrs with no issues.
One thing to note, which was mentioned already, nozzle size is around 5mm + the lip. It significantly reduces tip compatibility. So far i was able to put on whirlwinds, spiral dots and SD++, azlas and SP500.
On Indigos side. Tips change signature massively. My best call was cp145s.
Some tips i found make it too thick in lower mids or too dark. So it might affect first impressions badly. I actually had them on sale briefly jist for that lol.
In essence it will come down to preference. They are both very good.
I will update if anything changes during my sessions with EXT.