Of those two, the RAV is the most quite and efficient. No compact SUV is as quite as a quality sedan because of their inherant design parameters for room and wind resistance. The mpg difference of each is minimal. I would not degrade the CRV on road noise alone as it’s other creature accommodating features may be worth while. The Subaru Outback, IMO is not to be fear what so ever maintenance wise. It’s biggest advantage is it’s overall awd performance. Of the three…all are great choices and a personal preference on your part.