Southern baltic finns are genetically more related. Northern baltic finns are less related.
North-Estonian soils are on the Baltic Clint and thus more related to Gotland and south-eastern Sweden and Denmark. And that is also from where Estonia has got a lot of agricultural influences, also during the iron age.
South-eastern Estonia is less fertile for agriculture and their population densities have lagged the rest of Estonia.
South-western Estonia has got influences from Livonia and from further south. Whatever agricultural influences Estonia got during the iron ages, it was mostly from south and south-west and west; not so much from east. Eastern influences came about 400 AD to south-eastern Estonia, via setos.