Which is the best best to buy?

I will be staying in either Tokyo or Shinjuku for 3 - 5 days and would like to do the Alpine Route.
What part of the Alpine Route is not covered by the Tokyo Wide Pass and the JR East Nagano Pass?
What would be the additional fare for both passes?

https://www.japan-guide.com/forum/quereadisplay.html?0+168197
https://www.japan-guide.com/forum/quereadisplay.html?0+168331
https://www.japan-guide.com/forum/quereadisplay.html?0+168358
https://www.japan-guide.com/forum/quereadisplay.html?0+169149

Japan-guide.com has detailed information on travelling the Tateyama Kurobe Alpine Route from Tokyo which will help in your planning https://www.japan-guide.com/e/e7551.html