Bhai, I used to own Wagon R VXL before upgrading to 11th gen. Corolla Altis 1.6. Earnestly speaking, I found the interior plastic quality of Wagon R to be superior than that of Corolla Altis 1.6, notwithstanding that the later carries almost double the price tag as compared to the former. So, here Wagon R offers better value for money than majority of local PKDM cars.
About the suspension part, I have kept Wagon R and Mehran both, and declaring the later's suspension to be superior than the former is a highly biased statement in itself. In fact, I can safely say the comfort level of Wagon R is equal to 75-80% of the comfort level of Corolla, though the later carries almost 100% more price tag than the former.
Hope it helps potential buyers in their decision-making process.