Should not be different basically…are you sure the ones that were within 6’ were not controlled from the other GFCI within the kitchen?
Anyway…GFCI’s really don’t effect the 6’ of the kitchen sink thing…GFCI’s should protect all counter top receptacles so if you know that the ones near the sink are not on the other GFCI in the kitchen, call it out as a Safety Enhancement and report it as such.
**550.13(B) Ground-Fault Circuit Interrupters (GFCI).
volt, single-phase, 15- and 20-ampere receptacle outlets installed
outdoors, in compartments accessible from outside
the unit, or in bathrooms, including receptacles in luminaires
(light fixtures), shall have GFCI protection for personnel.
GFCI protection for personnel shall be provided for
receptacle outlets serving countertops in kitchens, and receptacle
outlets located within 1.8 m (6 ft) of a wet bar
*Exception: Receptacles installed for appliances in dedicated
spaces, such as for dishwashers, disposals, refrigerators,
freezers, and laundry equipment.