I would look for age at death to compare the two David's. Not always accurate, but may be of use.
Any instance of Timothy being used in the family as a name.Often Yorkshire folk used a naming pattern, first son named for father etc.
Any earlier Halewell wills ?
Who witnessed the marriage to Mary?
Did occupations run through the 2 families.
That's all I can think of for now, time to turn in!