Not quite sure what you mean by this question? They're just several manufacturers' takes on the water coaster concept. It's like B&M vs Vekoma inverted-style coasters...
If you're looking for differences:
-Intamin Aquatrax, typically launched, never makes a true 'splashdown'- splashdowns are simulated using water jets only, cars remain on tracks throughout
-Premier Liquid Coaster, bi-rail style track, cars run on top like a normal coaster, cars detach from tracks in wet sections
-Mack Watercoaster, cars sit in trough style track, detach from tracks in trough water sections, boats allow for much more exposure than premiuer version.
