I hope you are being sarcastic, otherwise WD would be misleading their customers.
The price difference isn’t just about the warranty.
Their product desctiption “Maximum performance for power computing.” URL: http://www.wdc.com/en/products/internal/desktop/
To most, 16ms isn’t good for how this drive is being marketed.
It seems that WD has stopped posting access times for their drives. I can’t seem to find it in their spec sheets either.
Weird, since their competitor are listing it.