What is the difference between isoflavone glycosides and its aglycones?

Glycosides (Genistin, Daidzin, Glycitin) are isoflavones which have a sugar molecule bind to their structure.

Aglycones (Genistein, Daidzein, Glycitein) are metabolites of the glycosides, without this sugar molecule that can be absorbed from the gut. They are the bioactive and absorbed fraction, where all health benefits are related to. Our body is well taking care of the metabolism.