Did you guys watch
@Currawong review of the Sony IER-Z1R?
Are any of you tempted to make the change?
I am not sure I heard a convincing enough argument.. just interested in a wider group opinion.
I have both the Solaris and the Z1R, so I'll share some thoughts here.
The Solaris is definitely the more balanced IEM of the 2. It has a coherent, detailed sound, with adequate sparkle up top, and a mesmerising midrange. Vocals sound lush and full, without being overly weighty.
Both the Z1R and the Solaris share similar strengths in detail retrieval, staging and instrument separation. What separates the 2, in the the most obvious sense, is in the bass region. The Solaris has nicely-textured lows, that can rumble when the track/song demands a little more impact. However, in general, the bass is a little lean, and this is where the Sony flagship shines. The Z1R has more than enough bass, with impactful slam that keeps the music thumping along. All this is done without overwhelming the lower mids and skewing the overall tonality.
However, with its slight emphasis on its lows, and an equally prominent high-end range, the Z1R loses a little in its midrange presentation; it takes a little step backward, making vocals sound a tad distant in comparison with the Solaris' rich mids.
I wanted to write a lot less, but my cursory comparison turned out to be a little longer than expected. In short, both are great IEMs in their own right. Both play well with many genres of music, but the Z1R fares better with dance music, where the track requires an ever-present bass line, whilst rock and pop sound a little better with the Solaris.