Did you build out profiles with all the different options in ProfileMaker? Even though Gretag claims the Colorful/Classic, etc options only affect Perceptual rendering intent, Relative is actually affected too.
Some people have reported that they think Monaco does a better job of smoothing than Gretag, which also may account for the differences.
Yes pfigen, I tried all perceptual options, Colorful, Chroma Plus, Classic.
I just took a look at the R800 (918 patches) profile that came with Andrew Rodney's book. This one doesn't exhibit the smudging I was talking about (my guess is that Andrew used the ICColor).