yes, nema 23 is more powful than nema 17.
This one is nema 23:
https://www.oyostepper.com/goods-65-Nema-23-Stepper-Motor-Bipolar-18-deg-06Nm-85ozin-088A-66V-57x57x41mm-4-Wires.html
Above one is more powerful than this one:
https://www.oyostepper.com/goods-494-Stepper-Motor-for-3D-Printer-DIY-CNC-Robot-10-50-Degree-C-04-Amp-Black-17HS13-0404S1.html