I did not like the fit of the umpro10. It went down to a73 and this, when I heard the a73,wow nice bass compared to the 750. If you guys notice, almost everything was of negative profile, so the RHA was actually at the bottom of the list prior to testing because I like the fit of negative profile most of the time. But when I tried the RHA on, wow, if fits well on my ear, and the seal was better than the a73.
Lots of things going for the RHA, build quality, fit, cable, lots of ear tips. To my untrained ear both are nice although the most obvious was the stronger bass of the fidue.
Sorry for the lengthy post, I am new to this.