Who's Bruce Springsteen?
To answer your main question, I think the difference is anatomy. I remember seeing a study somewhere that said that the length of your bottom sphincter was related to how continent you would be. Think of a hosepipe -- a narrow blockage can still let something through, but the escape is less for a wider blockage.
Another factor would be how effective the muscles controlling that sphincter are -- possibly that is determined in part by how fit you are.
One factor I have never seen mentioned is damage to the nerves controlling that sphincter. They must be near the prostate -- can they be damaged during surgery, just like the erectile nerves?
Age 63. Other than cancer, in good health; BMI 20
Pre-op: No symptoms; PSA 5.7; Gleason 4+5=9; cancer in 4 of 12 cores
7 March 2008, RRP, non nerve sparing
Two nights in hospital; catheter and staples out after 7 days
Continent, no pads needed from the get-go
Post Op: Stage pT2 M- N-; clear margins and lymph nodes; Gleason 4+4=8; prostate weight: 37gm
6-week and 7-month PSAs: 0
Bimix injections working well