different between sonovabitch vs sonuvabitch

English

sonovabitch (plural sonovabitches or sonsovbitches)

sonuvabitch (plural sonuvabitches or sonsuvbitches)

(derogatory, slang) Alternative spelling of son of a bitch
- 1973, Mario Puzo, Francis Ford Coppola, The Godfather Part II (screenplay, second draft)
  MICHAEL: Clemenza promised Rosato three territories in the Bronx after he died, and then you took over and welched.
  PENTANGELI: Clemenza promised them nothing, he hated the sonsuvbitches.

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