Civic is stiffened up for handling and stability
But it is not hard what so ever
Corolla is softer as compared to civic
But bcz of this the car bounces up and down
i have the pre facelift corolla altis 1.6 auto and above 80 km/h it becomes a near jumping castle
My uncles civic X is nice and agile and no bouncing what so ever
but i think corolla can be improved in this regard
adding stiffer springs and shocks and overall reducing ride height