Would you take it if the 10 hour day was 8am-7pm with an unpaid hour for lunch, and the 6 hour day was 9am-4pm (with something approaching a 25% pay reduction.)
9-6 is 8 hours + lunch, aka a standard work day.
We do 9-5 or 8-4 and everyone "kind of" take lunch during those 8 hours and managers don't throw a fit about it. Unlike my last employer, where managers were sticklers about covering lunch hour or favored eat your lunch at desk kinda deal. I would be totally fine with a 8am-7pm -- disciplined 10 hours day. I don't have a family, but i can see people appreciating and spending a three day weekend with their kids. Also for young people, this can take the concept of "seekender" to more literal levels.