JID, welcome. Of the differences between the two models(e.g. better video processing in the 1910), the power ratings are among the least significant. As others have mentioned, there's very little difference between 75 and 90 watts; specifically it's 0.79dB in maximum sound level on split-second peaks. For example, if a certain peak could be played cleanly at 103dB with 75 watts, it could be played at 103.79dB with 90 watts, not a significant difference.

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Enjoy the music, not the equipment.