U mean u want to use open pod filter? I dont think k&n got drop in air filters for kancil.

Just like your water filter, if the filtration system is good and can filter smaller particle, it will be resistive compared to sponge filter with the same cross section area in contact.

When there's Haze, you need to filter the air when you breathe. I give you handkerchief and paper mask. Which one breathes better. Which one reduces your chance of inhaling haze particles.

Both has it's ups and down. All depends on your weightage.