Yes. You should be frightened..... On the Third Dayt Arrived the Crow is my all time worst spaghetti western. Crap city.
He is more boring. Where Fidani actually manages to get something done bordering the enjoyable Crea is merely boring. There really is no comparison, so no even if you like Fidani you're probably going to hate Crea. I did at least. But hey one of the Crea movies I haven't seen yet could be the top of the pops but I seriously doubt it at the moment.
But you should of course definitely see the Crea movies just for research reasons of course. Who knows maybe one of them will make your Top 20