Yes rear suspension is very soft, spacer will work fine at cost of less comfort drive and less road grip as you will change the center of gravity of CAR, I have Toyota Aqua S 2015, traveling from RYK to Multan both via BWP-Multan route and Shujabad Route with four persons car never hit the ground if you drive with care & vigilance,
I think both cars have same ground clearance google it for comparison.