During the JetCorr meeting on May 22nd, 2018, it was suggested that I should I lay the trigger 'eT' distributions from data and Pythia on top of each other.  See slide 13 in the presentation below:

https://drupal.star.bnl.gov/STAR/blog/dmawxc/jetcorr-update-may-22nd-2018

Here are the distributions shown there on the same plot:

And there's a pretty big difference between the pi0 distributions.  This is due to hot towers; I forgot to remove them when I was making those plots.  The discrepancy is significantly improved when you remove the hot towers:

The difference in the pi0 distributions at high 'eT' is due to the fact that our ability to resolve pi0's vs. individual photons begins to degrade significantly as you get above 'eT ~ 15 GeV'.  The relevant ROOT files can be found in the attached zip file.