I've spent a good few days now with R-50, I'm not a believer of balanced armature burn in, though to my ears these have become rather crisp sounding earphone. Unless my brain is continually adjusting my pair sound rather different from that first listen. Some albums like Taylor Swift go down particularly well on R-50, natural, crisp, it sounds ever so slightly warm (slightly) without going over board, instrument separation is some of the best I've heard, non aggressive separation, it seems to ease across without smearing at anytime. Staging is fairly wide and
deep, this earphone certainly shows strengths of how good an IEM can sound when everything works together as one. "presentation"
The only thing I cannot recommend is C3 being a very good paring at higher volumes. for people using Colorfly C3 I think amping is the way to go, I just can't get the same sound from them unamped with that player. HM-601 performs well from headphone out, CK4+ is decent though C3 sounds rather thin / light to my ears and under developed. This can all be cured by amping though... a simple add on and how I listen to R-50 fulltime from my sources.
Are they better than H-100? I think so, depending on what kind of signature you want, I think R-50 are techincally stronger and possibly the safest choice over T-Peos with so many mixed feelings on that IEM. H-100 still rips the place to pieces with EDM IMO, sub-bass cannot be matched, It all comes down to what Alberto said about driving a smaller car.
That quote above a few posts sums up R-50 pretty well compared to H-100.