I think the main reason you shouldn't look at the Radius is because they're all mine. I mean, I haven't figured out how I'm going to pay for them all, but eventually I'd like to have them all. You would just become competition for me.
But seriously, the necks are very different. I found myself not playing the JS neck very often even though I was comfortable on it. The JS100 is a waste. The body is very different than the JS. And the hand sanding is usually uneven and it alters the shape dramatically from one JS100 to another. There's always inconsistencies in a contoured guitar like that, but I can't get into the JS100's myself. Maybe because I'm more into the late '80s Radius shape than I am the JS shape.
So if you really want the JS1000 neck feel, you'll have to get a Japanese JS. The 100 will feel different, and the
neck finish is very different.