For me, last season, my Salce started ripening main crop figs just 10 days after RdB - both in containers. RdB started on 8/11 for me. So I see Salce as worthy for an in ground trial.
Paully, thanks for your input. My plants need winter protection in ground - we have colder winters here. I have just added 10 in the ground to the 7 I already had planted in the past 2 years, and have another 6 ready to plant. It will be a lot of work covering these and protecting them well, but I think it will be worth it to increase my harvest. These include Sal's(EL), Chicago Hardy, Adriatic(JH), Bryant Dark, Salem White, MBvs x2, Malta Black, Black Bethlehem, Red Sicilian(MN), LSU Purple, LSU Tiger, Nero 600m, Jason's Unknown Black Ischia(probably Negretta), Florea, Improved Celeste(ICON), Unknown Chios Dark, RdB, Salem Dark, Niagara Dark, another one or 2 I cant think of at the moment, and one open space for probably Salce. Several of the above are in or going into a low-cordon planting as a trial.
Breba producers here are not likely to produce well in ground.