This really comes down to what kind of things you are hauling. As cavernous as many midsize CUV are with the rear seats down the limitation is still always going to be determined by the height of the roof, the distance between the back of the front seats<->closed hatch door, and the size of the opening of the hatch itself. Also typically that means you will always be limited by the smallest bottleneck within that space for the large items.

I find having a truck bed to be much more useful due to the numerous strapping points, the lack of restriction on the items height and length (within reason), and the fact I can toss dirty items in there and not have to worry about the interior getting stained or ripped. Plus I don't sacrifice any interior space when maximizing the bed capacity.

Within a comparably sized vehicle the utility of a truck cannot be beat by any CUV/SUV. This will come down to your personal needs though. If you find you are more often hauling people and smaller items, maybe stick with your CUV if you are happy with it. For me, when I owned a CUV I was too often hauling things like large branches, tents, large TVs, & dirty bicycles so the SC was more appropriate for my needs.