Anyone know if this 2019 18 disc Blu-ray set has the new scans with the color correction?
Yes mate, they are the new 2019 Special Edition releases - aka the ‘Maclunkey’ version.
This thread may be of some help trying to ascertain the difference between the two differing sets - 2019 re-release of the 2011 Special Edition version, and the 2019 ‘Maclunkey’ Special Edition:-
The 2019 re-release of the Original Trilogy films on blu ray & DVD (2011 SE version)