Tomica World--Amtrak Super Spiral

I understand.  I can see what you guys are saying.  The tracks from the different years are basically identical.  The buildings and trains are what appear to be so different.  Thanks guys for the info, as a collector of many things I think I like learning about different things as much as I like collecting at times.  I am going to look at what I have and then search around and see if I want to make a go at putting this thing together or maybe figure one that I really want and trade or sell the rest.