I have an old Hobie standard cart that has been in use for about 6 years. It has been amazingly durable. Everything on it is original including the tread on the tires. It has toted everything including PAs and TAs (I have extended the legs to clear all the scuppers). It works well on every surface except soft sand.
Being light weight and relatively small, it always rides with the boat. the low flotation wheels allow the cart to float, but it's still easy to reach under the boat with the cart to insert and withdraw it in the water (it is more difficult to do that with high flotation wheels).
I have no qualms about using this cart with any of the boats. If I had to replace it tomorrow, the current standard cart would be my first choice. If there was frequent long hauling or substantial rough terrain, the heavy duty cart might be advantageous. With soft sand, the Trax cart is the best way to go without straining.