Rear air conditioning vents, complete with rear temperature and fan controls, keep the atmosphere pleasant in back. Rear outboard passengers also have reading lights and neat cup holders that are housed in the fold-down center armrest. There are no reading lights or air vents for rear passengers in the QX4, odd oversights in a luxury vehicle. But the seats are comfortable and leg room is adequate if the front seaters can live with their seats no more than halfway back on the tracks. And rear passengers are pampered in cold weather with heated seats.
Fuel economy is almost identical.
The QX4 is rated at 15 city and 19 highway. Both the Limited version of the Montero and the QX4 come farily well loaed without adding extras. These just represent two. If you are confused it's undertandable. But if you boil your final decision down to these new entries, whatever decision you make you will come out a winner.