Doctor Who's theme song is awesome forever. I dunno Bleach's, but it probably sucks and changes every 20 episodes due to licensing agreements with Avex.
Doctor Who has totally hot companions, Bleach has interchangeable "babes" that only appeal to sub-pubsecent shut-ins.
Doctor Who is a perennial icon of BBC television and radio, Bleach is soon-to-be-forgotten flavor of the month.
Doctor Who has Daleks and Cybermen. Bleach has, I dunno, dumb death god ninjas something. How can you even remember this shit?
In conclusion, Doctor Who is like a treasured love stain on demi's favorite dress: untouchable by Bleach.