Although I would prefer a 'hard nosed' RIB (and without been an 'expert' on the subject-unlike many) I would say that in respect of safety it makes no difference what you have on the boat, provided all is constructed as is suppose to be constructed.
I know of 7, 8,10 and 15 mtr Loa RIBs that they have soft noses and NEVER had a problem due to the very high quality of construction and materials used. But I also know of RIBs that having an inferior construction ripped up all the pontoons on the first hard dive they got.
I also know of RIBs 7, 8, 10 and 15 mtrs Loa with hard nose and some of them are very good and some are rubbish.
So I think is how good, reliable and honest manufacturers are when they advertise that they can build a seaworthy RIB
This reply doesn't help, does it??