Is Baquacil Shock the same product as Baquacil Shock and Oxidizer?

Yes, "Baquashock", "Baquacil Shock", and "Baquacil Shock and Oxidizer" are all synonymous. Baquacil has been changing the names through the evolution but it's the same product. Most companies are now selling it as "Oxidizer (Shock)" - http://www.backyardexpress.com/baquaspa-oxidizer-shock.html