I dunno, I don't have the limited edition yet. A friend is going to Tokyo this summer so I'm sending him on a quest. I guess I could buy it online but I'm trying to get it cheaper! From what I've heard it's just a strategy guide though, and not an art book. I'll let you know when I get a copy!
This I can tell you about! It's mostly line art that also appears in the old books. There's nothing in there that's not in the B-Club Special Megazone 23/Artmic Design Works except it has art for the PS3 game in it, which is sort of neat, but it's only a couple of pages on it and the rest is pretty much recycled stuff. I guess it's good to see it back in print but it's not really that useful to me personally. Again, gotta go with the B-Club Special.