More like you just have to be patient and spend time to tweak the amp right first, then tweak the pedal according to that. The plextortion you had before is an excellent pedal that nails what you are aiming for, didn't have to sell it.
The way I go about this is, setting a clean tone that I like from the amp first, then adjust the settings on pedal. Play around with the three band eq, chances are, the eq in this will react differently from the setting of your previous pedal, so don't immediately set it to thaT and expect the same sound. Another tip is also not to put the gain all the way up immediately,turn it up slowly to your desired level of gain.