Wilde's original four act play was subsequently re-written as the three act work we now know. Many lines were cut, but almost none of them are especially to be missed. One scene, known as "the Grigsby Episode" was more substantial and elaborates themes that matter to our particular reading of mannered comedies as documents of the emerging categories and subjectivities of neoliberal political economy. Here is a clip of a fine production of Earnest in which they director decided to re-introduce the Grigsby Episode back into the play (from 2.08). I strongly recommend that you read the more familiar and canonical version of the play before supplementing it with this scene.