Did Jesus agree with the preceding Scriptures? Christians would say yes, and therefore is not some counterfeit.
Jesus rose from the dead and was crucified, to save His people from their sins. He was not a grand self-seeking phoney but a humble and lowly carpenter, He does not fit the 'false magician' bill.
The Apostles' lives were transformed by being with Jesus and witnessing Him risen. Jesus was stabbed in the side and brutally murdered on the cross, but came back to life, and the Apostles witnessed this and were so compelled they were now willing to die for this message. A sorcerer who is out to deceive would want to serve himself, he would deceive in order to get money, or to get power, or fame, or sex, etc. Jesus came to die though, He speaks of His death on many occasions to the Apostles, devoted to glorifying God. Once again, His actions do not fit the bill of a false magician.
The Pharisees accused Jesus of driving out demons by the devil's power, but Jesus replied how can Satan drive out Satan? A house divided cannot stand.
Another point would be the ascension. The Apostles witnessed Jesus ascend into heaven. If this was some sort of sorcery, where did Jesus actually go? He disappeared from the earth. He did not gain anything in this life on earth, but taught a message of radical love, the love of God for His own enemies, to die for them and reconcile them to Himself.