If bumper car sturdiness was my requirement then I'd go for the Dart 16 over the Twincat, but for that type of boat it wouldn't be.
Hopefully the point of using Twintex is that they will be able to get bumper car sturdiness equivalent to a Dart 16, Wave, or Twixxy and keep the weight down and stiffness up so get performance equivalent to a GRP cat.
All the best
Gareth
Gareth