What's the difference between prosily and prosy?

Prosily

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Definition:

• (adv.) In a prosy manner.

Example Sentences:

Prosy

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Definition:

• (superl.) Of or pertaining to prose; like prose.
• (superl.) Dull and tedious in discourse or writing; prosaic.

Example Sentences:

• (1) There is considerable sequence similarity between C. tsukubaensis alpha-glucosidase, the rabbit sucrase-isomaltase complex (proSI) and human lysosomal acid alpha-glucosidase.