Regular Panoptix has been around for a couple years but LiveScope just came out recently, like in the last couple months. The difference is basically the width of the sonar cone (Panoptix is 20 degees x 100 degrees and LiveScope is 20 x 135), and a big difference in clarity. Regular Panoptix is like a live or real-time representation of traditional sonar where LiveScope is more of a live or real-time representation of side imaging or down imaging, it almost looks like a low quality video where you can make out shapes of larger fish and structure rather than just blobs like the original Panoptix (which is still awesome).
As far as the learning curve goes it’s not a steep learning curve at all, it’s actually very intuitive. It’s a lot easier to explain to someone who hasn’t ice fished before than a traditional flasher is.