No, it's really not. Dick tends to be used to suggest selfish indifference. Bitch is much more often used to suggest malice aforethought, basically. So it is generally a stronger insult.
Though usage varies tremendously and is heavily context dependent. In some cases, women use the word bitch in describing themselves to mean they have backbone and are willing to stand up for themselves in the face of a toxic, misogynistic culture.
Though usage varies tremendously and is heavily context dependent. In some cases, women use the word bitch in describing themselves to mean they have backbone and are willing to stand up for themselves in the face of a toxic, misogynistic culture.