Pokémon Black & White (be warned: spoilers)

[Maxpphire]

Heracross
(difference of 15)

(difference of 25)
(difference of 15)
(difference of 25)

Add this up and you get 80.

Scyther
(difference of 5)
(difference of 15)
(difference of 20)
(difference of 0)
(difference of 10)
(difference of 20)

Add this up and you get 70.

again, Scyther and Pinsir are indeed closer tonegther then Heracross and Pinsir.

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Also gonna add that Beedrill and Butterfree also have a vast moveset from eachother and yet are still counterparts.

Hence why moveset isn't on my list of what makes a counterpart.