Earphone Geek is a pretty well-known audio blogger here in Japan. Rightly, he got a short but good ear on Sony's new earphones. Here are a few notes from his review.

XBA-H3 Highlights: ohmage

Wide sound stage
Good high frequency extension
Powerful, well-resolved 30-50Hz detail
Great sound balance for a hybrid dynamic / balanced earphone

XBA-H3 Highlights: porridge

Vocals should step out further

NOTE: MMCX connection

XBA-H2 Highlights: porridge

Balance is poor
Same confused high range as EX1000
Cloudy high range of Sony's previous XBA series
Too much bass for such confused high range

NOTE I: Sound that mimics the worst of the EX1000 and the worst of the previous XBA series.
NOTE II: Earphone geek notes NO good points.

XBA-H1 Highlights: ohmage

High range is a clear improvement to the cloudy presentation of the previous XBA series
High range still not perfect; some defects from the XBA series remain
Beautiful bass reproduction
Most mature-sounding of the new H series

NOTE: Among the new, bass-blessed H series, this model has the best cost/performance ratio.

Again, Earphone Geek's review is here.