Go with the Outback. While not great fuel economy, it is very good considering you are driving all 4 wheels. There is a safety factor in that 2 mpg loss. Ours would handle a small trailer, and traveling up a slipperly slope is what this vehicle was made for. My wife has driven up very challenging roads in the Carolina mountains, driving right by the SUV 4 wheel drivers who were pulling over. She is a wimp driver, so do the math on the confidence thi AWD system provides.
Go with the Outback. You may pay a little more. As Nike cornered the market on this saying, "Just Do It". If you can find one. Most owners keep them a long, long time. Another clue on their reliability.