Does the reward of "Whoever performs Hajj and does not engage inrafath (obscenity) nor fusooq (disobedience) will return as on the day his mother gave birth to him" apply to supererogatory Hajj as it applies to obligatory Hajj? And is the recompense of "Paradise" for obligatory Hajj only, or also for an accepted supererogatory Hajj?

The virtue of Hajj is immense. Whoever performs Hajj for the sake of Allah, and does not engage in sexual intimacy or commit فسق (disobedience/immorality), will return as pure as the day their mother gave birth to them. And Hajj Mabrur (an accepted Hajj) has no reward other than Paradise. Hajj and Umrah (definition) eliminate poverty and sins, just as a blacksmith's bellows removes impurities from iron. This virtue includes both obligatory Hajj and voluntary (nafila) Hajj, and Hajj Mabrur is that which is not mixed with any sin.