That is a very difficult question.
what Aria gives you over Storme 4x2:
1. Safety features (6 airbags, ESP, navigation, cupholders, usable 3rd row seats etc)
2. A very well planted ride, and much higher stability at high speeds.
4. Low price of acquisition
What Storme gives you over Aria:
1. SUV Looks over Aria's MUV looks.
2. Better driving position - bird's eye view or king of the road, whatever you want to call it.
3. New car feeling, and color choice.