No, chunk, not if you mean power per speaker. The 80 watt amp would supply each stereo speaker 80 watts(the other three amp channels would be at least temporarily unused); the 200 watt amp would supply each speaker 200 watts. Note however that even 200 watts(most stereo amps are less) is only 4dB more than 80 watts(e.g. 114dB rather than 110dB on a brief peak).

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Enjoy the music, not the equipment.