I guess I'm an oddball. I fully respect Leopards for the wonderful flyers they are, but that wing crease (Shark has it too) just never sat right in my hands. Could I have gotten over it? Sure. Glad I didn't have to, though.
They have a lot more HSS and are slower and glidier. They hold their stability for a long time but are still quite predictable once they do finally start showing turn. I honestly can't say enough good about them. A lot of my problems with "Innova clones" like the Patriot is that companies always seem to go faster. I prefer glide to speed. The QJLS has a lot of glide. I jokingly call it a Polecat driver because it's damn similar in terms of characteristics.
The mold piece combination that is floated around is that it's a TeeBird top with a Whippet bottom. I'm not saying I mold the discs, but it's amazing that such an overstable mold like the Whippet can produce such a wonderfully reliable straight disc.