I've been using Perfect Resize (Genuine Genuine Fractals) for quite some time now. Recently, I was up sizing a couple of images and tried the newest resampling option of Preserve Details (Enlargement) in Photoshop CC, and, when pixel peeping found it to be a hair better than the plug-in -- Before it was the other way around, where Perfect Resize had the edge (no pun intended). Just wondering if anyone else has noticed similar?
Personally, I feel that upsampling in Photoshop has been better than GF since the introduction of Bicubic Smoother in Photoshop.
I don't have the Cash Cow, but I would expect it not to have deteriorated since C6. :-)