Advanced Strollers 2010 Is Wheel Suspension Necessary For Strollers?

Is wheel suspension necessary for strollers? - advanced strollers 2010

What percentage of the difference in the suspension actually do? I am not one without the comparison, but I want a new sports car, not to buy too. (Specifically,) the Maclaren Twin Triumph. We live in the city, so that it only be used on sidewalks, paved roads, and the interior. Thanks in advance!