The rigs were very similar. The all up weight of the trimaran was 1,100 kg. The same for the cat was 860kg. Length for length the race cat should win out on weight alone. I would be the first to say - that would be a pity.
Variety is the spice etc.
My second response has to be - As an innovator, the basic idea of one long slim hull, with some widely spaced, light weight side support still has enormous appeal. The concept is entirely at odds with the current multihull norm where the tall rig, on wide beam, imposes enormous loads on the structure. During the late sixties and seventies, a number of designers experimented with long, light weight, wide, small floats, foils etc. They worked but they did not win. Eugene Riguidels standard Kelsall tri.