Burial of Benjamin Boyte 13 Oct 1807 Okeford Fitzpaine.
Burial of Benjamin Boyte 5 Dec 1765 Okeford Fitzpaine.
There is a tree on familysearch.org, which takes this Boyte family back another generation to Robert Boyte and MAry Gatler, married 23 Aug 1695 at Okeford Fitzpaine. (follow the little 'man' icon from the burial of the 1807 burial).
They have not found a marriage for Benjamin and Eleanor - nor could I. And they have not followed your Robert's line, so no more information about him on this tree.
They have followed the line through the daughter Eleanor born 1757, who married a William Ridout in 1777 in Bristol.
Yes this tree shows Daved born 1675 as the brother of Benjamin born 1696 curtainhooks, but as you say, that's a lot of years between them.
The parish register may well be in a pretty bad state by this date of course, with pages missing, torn or unreadable, so it's very difficult to say.