well...
from your site frankly.. so unless I'm reading the ratings incorrectly

Bim 18 Class A 1.00
Assuming this is the BIM A class boat.. Equivalent to Auscat 3 + 4s which appear to be equal to the flyers and 5s in outright speed

Formula 16 Cat Boat 0.97
Makes the solo F16 0.03 faster than an A..

And almost as "fast" as the
Bim 18 Double 96 which rates at 0.96 (is this the F18HT?) equal to the
Mattia Cat Boat 0.97
Mystere 6.0 0.97
Tornado 24m2 spi 0.97

faster than
Nacra 6.0 0.98
Nacra 6.0 Raid 0.98
Tornado 1.00 (guess this is the "classic" rig)