It would depend on the type of knife. For a small fixed EDC I like the 154 but for a big chopper no question it is the S7.
As for the question of toughness ,I suggest we use the 154 knives the same way we would any other knives. Is it to weak for good hard work? If it is then I would be
disappointed. Maybe it is as much the style and thickness of the HC that caused it to break? Would a 154 YKLE pass the HornDog test?