This is an inshore cat, they are very wide for optimal turning ability as they race on a short oval turning almost all the time, and have low tunnels (also better for the turns) because they race on lakes with relativity small waves.
This is a modern offshore cat, its long to cope with swell at very high speed, its narrow to reduce frontal area because they run for many miles between turns so speed is more important than turning ability, and it has a high tunnel to cope with big waves in the sea.
This is an older offshore cat, it's a cross between the two above, it's much shorter and wider than the modern offshore for better turning and has more deadrise for better turning and better ability to cope with waves and swell for its length (at the cost of some speed), and it has a higher tunnel than the inshore to cope with big waves in the sea.
Its boats like these that fit my criteria for modelling and my cats are semiscale representations of the Hydrolift CR 28 seen painted pink above, I believe the red one is the slightly smaller CR 26.
Just like cars, its all a bunch of compromises and my ideal boat won't necessarily be the best for what you want to do, or where you want to do it.