Well these are very initial impressions, so take it with a big grain of salt L700 is a little sharper, easier to drive and has better sound stage, 3D/Holographic sound (this I believe is due to larger driver and/or my ears more used to the sound of Lambda series). RR1 have a more organic sound signature and to my ears are balanced sounding (more like a planar with little more details on few tracks). Hope this helps.
I have read from more than one impressions that RR1 sounds more like a planar. Would you say something like Edition-X? Thanks.