I read this claim with my typical skepticism, but AFAICT it is mostly true. The second brother wasn't killed exactly a year later, but close enough, and the intersection wasn't exactly the same one, but very close.

www.hoaxorfact.com/Paranormal/coincidental-twin-tragedy-in-bermuda-facts.html
skeptics.stackexchange.com/questions/20498/were-two-brothers-killed-on-the-same-moped-by-the-same-taxi-driver-exactly-a-ye

That said, there appear to be no records of these incidents at the Bermuda National Library - Digital Collection:

cdm16347.contentdm.oclc.org/