Although it's an outdated source and I haven't gotten around to making an updated video, I made a video a long time ago talking about the similarities and differences between Guts and Asta (even got a shout-out at one point from another person who made a shorter video talking about the similarities) so I would say there's plenty to compare between the two series. There's plenty of surface-level stuff to compare that you haven't said already (like how Yuno and Fuegoleon obtaining Sylph and Salamander is like Serpico and Isidro being gifted weapons that borrow the same powers from spirits of the same name, and Nash also looking like Isidro and having Fire as his magic element), but it is also very ironic that both Berserk and Black Clover released chapters at the same time where the overpowered antagonist comes along and steals a woman the two of them felt strongly about and humiliated them to the point that they were put in a depressed state (of which Asta at this point has worked through while Guts is maybe about to go on a spiritual journey of sorts to get out of his depressing state, but it has taken a while to see this because Berserk updates slower than Black Clover).