Hi Justin
I prefer gmax for the same reason i prefer Pandoras Box:
It has more possibilities!
PB Warper has paitbrush tool for masking, so nice, but i feel better with lines and points instead of brushes and forms.
Also it's possible to hide some faces, but it's never possible to cut one face, very useful when you have more than one object to map in the same output.
I found a workaround:
make the cutted plane in gmax, load it on a graphic layher with a white bitmap, then export the preview output into PNG file.
Load the PNG into a graphic layer on the top, apply white key and blur XY effect. That's it! Masked surface with gmax and softborder.
I think it would be very nice to have an Aeon FX that makes soft border for the imported surface.
Regards