Shinkansen or night train ?

1. From Osaka- Tokyo better use night train or night bus ?
2. Where can i see the seat or compartment in night train ?
3. How much shinkansen from Osaka to Tokyo ?
Tq

From Osaka- Tokyo better use night train or night bus ?

Overnight buses are cheaper and more easily reserved from outside of Japan and depart at more comfortable times than the night train. The night train departs at 0:34. However, some people will consider the night train more comfortable than buses.

Note that the night train (Sunrise Set/Izumo) stops at Osaka only in direction of Tokyo. Trains coming from Tokyo do not stop in Osaka.

Where can i see the seat or compartment in night train ?

The train carries various types of compartments.

Composition:
http://www.jr-odekake.net/train/sunriseseto_izumo/compo.html

Cars in detail:
http://www.jr-odekake.net/train/sunriseseto_izumo/seat.html

Photos:
http://www.jr-odekake.net/train/sunriseseto_izumo/accommo.html

How much shinkansen from Osaka to Tokyo ?

http://www.japan-guide.com/e/e4006.html