Hi, Dan-
I'd like to be sure about what we are looking at. Are the SUMA results in the red circle shown by projecting those very same volumetric results onto the surface? (I am guess that the answer is *no*, because of the coloration.)
Or did you do two parallel analyses, and the outcomes appear different? (If "yes", what were those analyses?)
Also, are you thresholding/clusterizing either of those images? (It looks like both are thresholded.) Are the values the same for that?
--pt