Don't doubt on the product, you can find good difference in pace. One of the lightest shoe with 209gms under 15k. It's a tempo run shoe and not for daily practice. If you use it as practice shoes, then you can get less life.
Best on thar roads and superb on red soil tracks. If this is your shoe is to run on roads and synthetic tracks, it will give a bit more life to shoe compared to red soil tracks.