You do realize that AZ, Sputnik and J&J are basically identical, using a genetically modified Adenovirus to deliver the genetic code for the SARS-CoV-2 spike protein into your cells.
Similarly Pfizer and Moderna are almost identical, both use mRNA with an engineered mutation developed at the NIH Vaccine Research Center (plus other labs). J&J uses the same engineered mutation but the DNA version.
Sinovac is an inactivated virus vaccine. You should read about the Cutter Incident first.