The Polaris LS and the JLS are...eh, they fly the same. The JLS is faster/longer.
The thing with them was that the Polaris LS was kinda sorta like a Cheetah and the JLS was kinda sorta like an Eagle (X, since I have to specify now), but both of the Innova versions had a buncha fade at the end. This was common at the time, all Innova discs were made in what you now call DX plastic and they were designed to start out with fade that would beat out over time. Millennium discs were made in a higher grade plastic (what you would call Pro plastic now) so since they were more durable they didn't need all that fade. So the Millennium discs would do that early turn S flight and then come back, but they didn't fight back as hard as a Cheetah or Eagle would. If you had that dialed in, they flew farther. If you didn't, they would flip on you. The Polaris LS was easier to flip since it was slower, the JLS seemed less likely to flip on me. Once you switch from the base Millennium plastic to Q, a lot of the tendency to flip went away. I really like the QJLS as a workhorse control driver. The Q Polaris LS for me got lost in the KC Pro Cheetah/Champ Leopard range of "these discs do basically the same thing." Champ Leopards are so much easier to find that I don't know why anyone would bother looking for a Q Polaris LS.
They really overlap too much to carry both of them IMO. I still bag a QJLS from time to time, I have not thrown a Polaris LS in ages.
Orion LS's are a lot faster and I can't throw them worth a hoot, so I have nothing to really add about them.