nothing i have driven these stock tyres y general upto 60000km ,curently driving bg trako in my yaris,yes these branded tyres provide a bit better comfort a bit better handling and a bi longer life but mostly its psychological efect and these mafias in pakistan who implant such ideas in common people to earn money,i have driven continenal ,yokohama,general ,maxxis and many more just in last 6 years i have driven 250000 kms in different cars ,trust me is mulk main har cheez main magarmach baithe hain