To add to GBC's comments, my vehicles over the past few years have included an 2.5 litre turbo diesel NH Pajero, 2.5 litre petrol Xtrail, 3.2 litre DID NS Pajero, and currently a 2.4 litre DID MQ Triton. They were all quite good towing moderately sized trailers, but the 'proper 4WD' diesels, including the old Pajero were all much better towing heavy stuff than the X-trail, even though it had the best power to weight ratio (by a fair bit).
The MQ has barwork all around, LT tyres, drawer system, extra battery etc. etc., so it's pretty heavy just by itself. When I hitch the camper on the back, you know it's there because it takes a little longer to accelerate to any given speed, but apart from that you would hardly know it's on the back. As far as a daily driver goes, the X-trail was the winner for comfort and ease of use, but for off-road and towing, there is no comparison. The 'proper' 4wds are the clear winners.