Lyra2 is a completely new (password hashing) algo, not used in any cryptocurrency. Lyra2RE is Lyra2 with reduced efficiency by chaining with other algos (like x11). It's not clear if vert is going to become multi-algo (lyra2 and lyra2RE) or one or the other or what, tbh...
Now is this at all similar to Aptcoin's algorithm? I have heard that they are doing some reduced efficancy stuff by having high n factors. But if the coin used something similar to x11 wouldn’t it be "more" efficient because the x11 uses less memory? I guess alot of this is yet to be determined.