The AL Titan and Titan LX (including Supreme) are different second stages. The LX and Supreme have the same second stage best I can tell as the Legend. It is a compact and lightweight unit that is easily dissassembled. The Legend LX gets a metal beauty ring that could be installed on the Titan LX since they are the same. If there are minor differences I don't see them. I have had both at considerable depth and just breath exactly the same for all practical purposes. You can install a Y block from DiveRite to split the HP for a transmitter and spg, something I have no interest in. I also like the simple and compact first stage, good hose routing for singles diving and not as heavy in the bag as the Legend. I have the Legend rigged with yellow Legend octo that came free with it on standard yellow 40 inch hose as delievered from AL. My wife uses the Legend. I have the Titan LX for myself rigged with two matching black LX seconds, one on a 5 foot hose and the other on a standard hose for experimental purposes. I also dive it with a 40 inch hose and right angle connector on the 40 inch hose under the arm. I breath the long(er) hose (Hog style), my wife breaths the short hose (standard ocot set up). Frankly, I rarely use a single hose but that is another story. I actually bought two Titan LX for use on independent doubles and just share them around to each other. Good luck with your choice. N
