Sony 50-150mm f2 vs Tamron 35-150mm f2-2.8: A Lens Comparison

I've been a long time owner of the Tamron 35-150mm f2-2. 8 lens. And before I even dive into this comparison I'll be flat our honest with you. The Sony 50-150mm f2 is a very good lens -- but it is absolutely nowhere as useful.