I have used almost all brands including Locally fabricated ones.
Almost all have same life span more or less as highly dependent on your driving skills, habit and subjected environmental conditions.
For safe side, I replace them after 2 years time period ( My habit is soft braking and i used to drive with low and moderate speed driving) i do chanfe them wether they are apparently good or bad as due to moisture as well as
splashing Street waters, high pressure water sprinkles at service station, mud on Karachi roads, humid and moist atmospheric condition all such factors contribute to their life deterioration.