Interesting. There are similarities, but also major differences.
- Throat slashing. One of the victim was also almost decapitated.
- One of the victim was a courtisane, and Pranzini made money pimping.
but the motive seems to be theft. Also, I don't know where you got the mutilation part, but it's pretty much absent from the French wiki entry, apart from a few lacerations on one of the victim's wrist.
Is it progress when a cannibal uses a fork?
- Stanislaw Jerzy Lee