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Having suffered sever AFB when a neighboring unregistered apiary died out
because of it, I can say that I used both and agree with what has been
discussed.  I would add that after having a hive very weakened by AFB it
seemed impossible to control with TM25.  However further spreading
throughout the apiary was avoided by plugging all entrances of the weakened
hive (to prevent robbing) until it could be burned and feeding TM25 to the
whole apiary and any other apiaries that you might have taken equipment to.
 The burning had to be delayed because we were suffering a drought and
fires without a permit were banned.
 
I note too that Ontario  no longer requires the beekeeper to burn AFB
infected hive.
However it is still recommended to burn heavily infected frames after
dumping the bees onto new foundation.
The colony should then be treated with TM25 and closely monitored.
It is still recognized that burning the whole hive (and all infected hives)
is safest.
 
.... george