Coated cast bullets are just cast bullets with a thin coating used to prevent leading. They are cast bullets. Treat them like cast bullets.
Of course the manufacturer acts like it's some miracle cure. It's just your standard marketing...
Pushed a little harder? Sure, maybe, it depends... If done correctly you can push traditional cast bullets 2,000+ FPS. With traditional lubed bullets you can run into a variety of problems if the bullets are too small, the lube is too hard, the alloy is wrong for the application, etc. Coated bullets won't lead the bore even if the bullet is too small or alloy to hard or too soft. So there is some additional leeway with coated bullets, but if prepared correctly lubed bullets are just as good if not better. The long range accuracy guys still use traditional lubed bullets, at least that's what I've been told.