All prostatectomies are radical so I am guessing that your question is about the difference between open and laparoscopic or between laparascopic and da vinci?
The risk is slightly lower for men that have had da vinci / LRP than those who had open RP in one large study - the lowest risk option is peritoneal RP but that seems quite an uncommon operation these days. Most of the members on here that have had IH had LRP but then that isnt so surprising as the majority of recent members opted not to have open surgery.
This is only my observation and purely anecdotal but thinking back over the last 3 or 4 years, our members that have had hernias were often the ones who had keyhole surgery and then perhaps went back to working, driving, golf or whatever very quickly .... perhaps the risk is increased by geing lulled into a false sense of security by the very tiny wounds? Anyone with a big wound across their belly or on their peritoneum is going to be reminded frequently that they have had major surgery?