AM only had the SD version of it but I a/b'd them anyway.

The acoustic guitar you mentioned sounds more natural on the Arya's , the 109's adds a bit more twang as each pluck falls away. That could be the tuning. They both have the same tickle, so they both have what you described. However, because the 109 brings everything in closer to you, it's a lot more enjoyable. I don't want to say musical but that's what it sounds like. lol

His vocals are fairly similar after 1:00, 109's brings out his raspiness slightly more; especially after 1:20 where he strains a bit and does his vibrato thing. Again, that's likely because the soundstage isn't as wide so everything is more intimate. But because the 109's are just warmer, it makes this track more enjoyable. For me personally, it would get a bit fatiguing listening to this on the Arya but that's totally subjective.

All in all, if you're strictly going after the airy top ends with huge soundstage, go with Arya. But if you're willing to sacrifice any of that even a little bit, the 109 should probably be strongly considered (at least from my limited time with it); the cost difference vs performance is kind of too good to ignore. Are you willing to give up a bit of the Arya's soundstage to save $400? I'm kind of leaning towards yes.