I don't see why anyone expects Woz to be a die-hard rabid fanboy of all of Apple's products ... he hasn't been involved in Apple's product development for almost 30 years, and he's obviously not someone to blindly evangelize based on marketing hype. Now if s/Woz/JonyIve/g then this article would be more noteworthy.
Simply put, it's because plenty of people don't know much about him, and so "Apple founder prefers <rival> to <Apple product>" makes not just good link bait, but good content for those people as well.