I have both types, both have advantages. I like the gold colored conventional lenses for TIG welding. Interestingly I can move my head to reflect some light back on the work with the gold lens. Plus the large gold lens is optically water-clear when welding and has a HUGE field of view. Great for welding when out of position, such as looking down over my nose.
The Miller auto lens is uber fast, has adjustable darkness and allows accurate viewing before welding. However, it's optically inferior and has a narrow field of view. Even so, this is the one I use most.