Okay so I recently bought the RC-10 just to answer my own question.
Well they are still in the break-in stage and so I won't do a critical comparison with the M3Ti yet. However, from initial listening they sound smoother than the M3Ti. The treble is really amazing. It never sounds harsh or have any glare when playing a bright recording. The mid range is pretty sweet sounding and neutral. The sound is a bit on the laid back side. Sound stage is adequately wide in a smaller room, and imaging is decent though not very crisp. The most impressive aspect besides the smoothness of the top end, is that these RC-10s are great at low volume. There's impact and musicality that shines forth even when playing softly. These speakers would be great for playing background music in the evening. Finally the cabinets and binding posts are top notch quality. I'd definitely say it's a step up from the standard M3Ti vinyl finish.
