different between superciliously vs cavalierly

English

supercilious +? -ly

superciliously (comparative more superciliously, superlative most superciliously)

cavalier +? -ly

cavalierly (comparative more cavalierly, superlative most cavalierly)

In a cavalier manner.
- 2003, Bill Bryson, A Short History of Nearly Everything, Black Swan, pg.46:
  Far from marking the outer edge of the solar system, as those school-room maps so cavalierly imply, Pluto is barely one fifty-thousandth of the way.

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