I flew so many CL planes, I can't remember any of the names of them. I was a kid then too. The one's I flew had cox 049's even though I collected others. The one I used most was the Cox golden B. My dad flew some free flight while he was in the Korean war. He and some of his budies flew one that turned north. It was last seen heading accross he DMZ. I still have some of his old engines from that era.
I choose the Lanier ST-40 Simply because of price. I got it for $40 on ebay. Since I crashed my Kadet last fall, I had an engine, radio gear, etc. that just needed a plane. The sig LT-40 isn't (I don't think) the same Kadet I flew. It looks much easier to build than the older type Kadet I had (In my own opinion). My old Kadet had a plastic cowl that was a pain to deal with. It always was hard to get clean (inside) after a flight. You couldn't get it clean without taking it off, which meant you had to take the whole prop and spinner off too. The front of the fuselage had more carving to do than the sig lt 40.
I had never tried or heard anything about the Lanier so I decided just to try it. I loved it after I built it, it was so easy. I built it in a week. Everything is laser cut and fit together like a jigsaw puzzle. If I want to spend many hours on a plane I don't want it to be a trainer. I build trainers to fly and if I crash them, I don't worry so much, because I know I can salvage the guts and fix it easily or build another. So to me speed of building is a good thing.
My RC Hangar
I have some pics in my RC hangar of my old Kadet. It looks like the same wing as the sig lt 40. Which I saved and put on another airplane. I would say that if you build it straight, the sig lt 40 would fly great. One thing I would note, is the lanier st40 does have a skinny fuse. The Kadet's might be considerably wider. It's one thing to consider if you don't have skinny fingers. I have some build pics of my ST-40 if you want a better look.