In the Senate, and later again in his office, chancellor Palpatine tells Anakin how Darth Plagueis taught him everything before being slain by Palpatine. Does this include the power to save lives and to make midi-chlorians create life? Palpatine later tells Anakin (now Darth Vader) that only Plagueis was capable of this, which is a contradiction to his former statements, but that when working together they can lift the veil. How much power did Palpatine / Darth Sidious have over the midi-chlorians?
It depends at what point in time and what you mean by that.
By Return of the Jedi, I’m sure he could do everything Plagueis could do and better. He spent so long studying and advancing his knowledge. He created life in Snoke and successfully cloned a powerful Force user. That’s something everybody who tried had trouble with. He also would’ve had more time to read through Plaguesis stuff. Palpatine said he can’t bring Padme back to life once she died, but before that he probably could’ve kept her alive.
However, if you’re saying it like were they the exact same, then the answer is a definite no. Palpatine far eclipsed his former master, and likely knew many things Plagueis did not.