Gifs - to dither or not to dither... that is the question. typical result of gifs with fewer colors is banding. See the bottom for two jpeg comparisons

No Dithering	Dithering
8 colors - 5.8k	8 colors - 8.3k
16 colors - 8.6k	16 colors - 11k
32 colors -11.5k	32 colors - 14.7k
128 colors - 17.9k	128 colors - 22.1k
256 colors - 21.3k	256 colors - 27.3k
JPEG - Maximum Compression - 18.9k	JPEG - Maximum compression without degredation - 22.5k

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