N95girl, the One
is the exact same board as the Surf in the 9'5, 10'2 and 10'11.
Your 10'6 Surf is narrower and more performance than the others, so they took the wider ones and changed the name to "the ONE"
You asked:
" Would 1 more inch on the width make a difference and only 7 more float? "
The ONE is fuller in the nose and tail than the Widepoint.
When you add up the nose and tail width, more volume and 1" wider over all.... that adds up to a lot more stability.
I am 105 kg, plus wetsuit.......I found the 9'5 The ONE to be very stable in my winter gear, so I am confident that the 10'2 will be ok for you.
The only way to know for sure is to test them on the same day.... if you can arrange that