I've had the eph-100 for a few days now and enjoying them a lot, but thought I'd add my perspective from a GR07 fan... just to clarify, I don't consider myself an audiophile but appreciate good earphones and higher bit-rates. I've used sony 888lp for best part of the last 15 years, loved them, but bass lacking, they are to hard to get now, so got in the IEM game over the last 12 months, no going back now, its a fun hobby :-)
eph-100:
- lot of fun
- no sibilance I can tell
- bass heavy, great punch and rumble, but a bit more than I would like for everyday use, fun when in the mood
- Hear every instrument great and vocals stand out sometimes better than GR07, but not always
- Better isolation
Its just a few days so I still need to burn in the eph-100, which the GR07 really needs, but I don't see any contest, GR07 is the best for me. The bass is perfect, especially sub-bass, if the song has it the GR07 gives a suprising good punch, but doesn't over emphasis on songs where bass is lacking, the eph-100 tries to hard sometimes becoming distracting to the music, but it never distorts its, music is always very clear,
I see mentions on various post's on how the GR07 is boring. It's not. I felt the same way when I first got them, but after burn in and keeping them awhile, I've grown to appreciate how great they sound, I forget I am wearing IEM's listening to them, now I would never give them up,
Miow, I agree with a lot of your findings, but GR07 is not lifeless in comparison, after the heavy bass of the eph-100, the GR07 is like a breath of fresh air, but I think that's my personal taste. Not a criticism of the eph-100, I'm definitely keeping them as they are a lot of fun, I will use them a lot, but if I was forced to choose only one, its the GR07 no contest,
a bit off topic, I also tried the JVC FXT90 but did not like them much, GR07 and EPH-100 are by far better I think. The FXT90 bass seem poor to me, coming from the GR07 initially, they just do not have the same overall sound quality, but I find it hard to explain why. I've tried a good few IEM but time to take a break, the GR07 and EPH-100 are both fantastic, all I want for now,