grub fallback mechanism

["Colin Ingram" <synergymus@gmail.com>]

I'm trying to test a new kernel remotely so I would like to use grubs
fallback mechanism.  I was wondering what is the difference between
doing using a config like this one taking from grub manual

     default saved
     timeout 10
     fallback 1

     title A
     root (hd0,0)
     kernel /kernel
     savedefault fallback

     title B
     root (hd1,0)
     kernel /kernel
     savedefault fallback

or just this one

     default 0
     timeout 10
     fallback 1

     title A
     root (hd0,0)
     kernel /kernel

     title B
     root (hd1,0)
     kernel /kernel

are these two configuration functionally different.  Thanks for your
help.

Colin