A lot of numbers up there

. It is near impossible to compare foil sizes from the numbers of different brands. yes within a brand you could attempt to work it out, but ideally you need to the lift coefficient and the velocities to assume how much lifting the foil will do and at what speed. Foils just don't lift, they generate left as a byproduct of velocity. But in the is also drag which is a real biatch, a bigger foil is not necessarily going to produce a proportional amount of lift as they drag coefficient may differ. A bigger guy is not just going to be heavier themself, but so is their board, potential wetsuit, etc......... which was also pointed out above. Weight is an exponential tax, and in general creates faster speed roll off, harder paddle ups, requires more lift proportionally and stresses spars (mast and fuse) more resulting in flex which inherently equals loss of power.
Aas always said, and said above, demo if you can or try find someone a similar size to you (ideally in ability too) to really see how a foil feels, 5kg makes a huge difference, 10 is another sport.
JB