Soft Suspension just give comfortable driving at low speed and save ur car from damage from bumps it will absorb bumps very smoothly nothing else while hard suspension have only 1 negative side uncomfortable ride but it have many positive sides
U can steer ur car easily at high speed on extreme corners while in a soft suspension car if u turn right the whole weight will lean towards the left side so the right tyres will loose the grip and whole stress will be on left tyres and soon they will also loose the grip and so is the car.....
If u go over bumps that lift ur car up in the air (There are many such bumps on GT road on corners) at high speed hard suspension will bounce the car once or twice MAX and it will be stable again in no time while soft suspension will keep the car bouncing for quite long and in the mean time if u will steer the car hard the car will loose grip...
During braking hard suspension work better than soft cuz also in this case most of the weight will move towards front as the car will lean towards the front.... and there are many more like a car that lean makes a very uncomfortable to drive at high speed....
I own a cuore which have hard suspension that,s y i noticed all these things and i can feel the car working well at high speed and corners so what i think is that ... For pak roads a car should have normal hardness of suspension so it can work well on both high and low speeds cuz we have bumps both on low and high speed roads 
If i,m wrong anywhere i,m sorry in ADVANCE
