I'm not sure you can really compare them. Granted, they both have full-frame sensors so there's a degree of overlap but the RX1R's fixed lens will force you to move around more, especially when you're looking at a juxtaposition of portrait and landscape photography.
Is it unlikely that you'll be in locations where it is impractical for you to get far away from or close enough to the subject to frame it as you'd like?
DSLRs: Canon EOS 7D Mark II, Canon EOS 70D
CSC: Canon EOS M3
Lenses: Canon EF-S 15-85mm f/3.5-5.6 IS USM, EF 50mm f/1.8 II, EF 100-400mm f/4.5-5.6L IS USM, Canon EF-M 18-55mm f/3.5-5.6 IS STM, Canon EF-M 22mm f/2.0 STM