How do they compare ? It's obvious the 130 will more stable/easier to uphaul on.and shlogging around. But on the foil (same foil and sail setup) how much of a difference does the physical board make ? And while we are at it..how about 114 vs 90?
again specifically when on the foil.

Not much difference between the 114 and 130 unless you are close to 100kg and then you would want the extra volume. Maybe on the foil someone would notice a little decreased agility on 130 v 114 but not so much a heavy rider should take the 114.

No nose boards like the 90 (which i have never ridden only riden the freestyle 87) are cool feeling and at least pyschologically feel more agile.