No. "successive transactions of the same value [between the same people]" will not have the same transaction inputs. A 'transaction input' in bitcoin isn't the

No. "successive transactions of the same value [between the same people]" will not have the same transaction inputs. A 'transaction input' in bitcoin isn't the originator's pubkey, it's the output of a previous transaction. A second transaction which literally had the same inputs as a first would be a doublespend attempt.