I don't foil drive but been riding KT for over a year now. There's a massive difference in size between the 960 atlas and 830 Nomad.960 atlas is actually a pretty big foil, I SUP DW it in 12ish knots.
I think with the foil section on the Atlas and Nomad, the additional span adds more and more early lift(like 15cm difference between the 2 foils mentioned ).I've had a go on the 1130 Atlas and that is just ridiculous compared to other 1100ish area wings on the market