If you have a subscription to Findmypast, you should be able to see a list of those who died on the 'Northfleet'. I can't see a way to navigate from one image to the next/previous, so I think you will need to use the printed list to give you names to search for here:
http://www.
findmypast.co.uk/search/at-sea/deaths
N.B. Some of the spellings in the original list are most odd: I had some difficulties finding the Webbs, as George is listed as Wabt, and Thomas and his family as Webt.
Mostly the handwritten list on FMP gives no more information than the one in the e-book, but you will find out whether poor little baby Webb was a boy or a girl.
From newspaper reports, some bodies were beyond recognition when washed up. Some of these were buried at Lydd (again, from the newspapers) and there is a memorial there to William Norman, passenger on the Northfleet, and 'five others unknown' who were drowned:
http://www.
kentarchaeology.org.uk/Research/Libr/MIs/MIsLydd/MIsLydd.htm
It isn't clear how many bodies were recovered. I can see what looks like William Norman's death registration in the Romney M(arsh) district in Q1 1873, and there are a few registrations for 'unknown' people in the same quarter.