Nope - It's not exactly the same.
As I stated above - -
First, the measurements for bike boxes are stringent on planes and next to non-existent on Amtrak. Most Amtrak stations that accept baggage also have these jumbo, roll-in bike boxes for $10. Of course, you can always get a box from a bike shop and pre-pack it more carefully. Second, Amtrak only charges $5 for the bike. Many airlines have hiked their bike fee from $50 to $75. That would be $150 both segments of the journey.
http://www.amtrak.com/servlet/Conten...Page&c=am2Copy