The McPherson system relies on struts, which allow passengers more room in the car as they rely on a more vertical placement than the double-wishbone option. ... Wishbone systems are associated with more stability, and alignments of the steering and wheel systems remain more constant.

Here are a few key differences to understand when comparing double wishbone suspension systems against McPherson systems:

1. The McPherson system relies on struts, which allow passengers more room in the car as they rely on a more vertical placement than the double-wishbone option.
2. Wishbone suspension is usually relegated to the back of a car, whereas the McPherson system is typically only used for the front. A system is recognized as a double wishbone when there is a wishbone configuration in the front, as well as in the back, of a vehicle.
3. Wishbone systems are associated with more stability, and alignments of the steering and wheel systems remain more constant.
4. The McPherson system, with its lack of an upper arm, allows for individual impact absorption for each front wheel, which usually results in a smoother ride for passengers but can reduce the car’s stability in corners.
5. Although the presence of an upper arm makes the double-wishbone suspension arrangement more rigid, you’ll find that it also increases your ability to handle the vehicle in more challenging areas like hilly or curvy terrain.
6. Double wishbone suspension systems are usually more expensive to work on owing to the fact that there are simply more parts involved and these systems are more complicated to work on than their McPherson counterparts.