furthermore moreover

Moreover : 再者 (beyond what has been said)
i.e. The acceleration performance of this car is very poor; moreover, its fuel consumption is extremely high.”


Furthermore: 而且 (in addition to what has been said)

i.e. The acceleration performance of this car model is very poor; furthermore, its fuel consumption is extremely high.”

In the first example, the speaker gives 'an impartial, co-equal assessment of the two inadequacies of the car model', whereas in the second example, a critical judgmental sense against the fuel consumption aspect is conveyed. The speaker’s bias shows somewhat.