fair enough.....all of us tend to compare with the cars we are currently own regardless of price or category bracket.
you have the ultimate corolla to compare with so surely cultus would lack behind.
when i first got the car it had way tooo many rattling sounds coming from dashboard then one by one i diagnosed them and asked dealership to fix it by pin pointing the root myself...even the cd player had kharak in it i asked them to replace the complete unit and problem solved 
i can safely say now i have 0% rattle/kharak sounds coming from inside the cabin or outside...