Hello Abdul. I think that you are comparing two different things here despite the similarity in the general mechanism. Polymerase Chain Reaction or PCR, is a general amplification method that amplifies specific target by using two primers that bind to the two different proposed ends of the target and amplify it by DNA polymerase enzyme. the results can be visualized depending on the type of PCR, for example, conventional PCR uses agarose-gel DNA amplicon migration under electrical current. PCR alone cannot yield your target DNA sequence; however, Sanger can do this, Sanger is a sequencing technique that utilizes the Chain-Termination Method by using unique dNTPs that do not have 3-OH group in a PCR reaction. These dNTPS are labeled with 4 different fluorescent dyes and the final fragments will be sized-separated by Electrophoresis and fluorescent signals are recorded to yield the sequence according to each specific dye. In my lab, we would use PCR first to yield a PCR product (amplicon) and then apply Sanger sequencing for this product in order to have the sequence of this product. Thanks, and please feel free to contact me for any questions.