It's not possible to see the discussion unless you join Lindekin 
What is being said and which software is being mentioned?
However, regarding QU, there's no contest really, see: -
http://www.ddisoftware.com/qimage-u/tech-prt.htm

Terry

comparisons with out of date versions of Photoshop and Lightroom aren't really helpful - recent versions of Lightroom and Photoshop have significantly improved their print output. I recently did a quick check between current versions of QI, Lightroom and Photoshop when preparing a talk on printing for a local camera club, and found very little difference between the prints.
(Two differences that do remain are:
Qimage can retain layouts for later reuse
the Adobe programs can output a 16 bit file for further processing if you want it
)

I took a section of a 12Mpixel image I'm familiar with, equivalent to the whole being printed at A1 size, and printed that through the three programs. That would be roughly 120 ppi by my calculations. Printer was an Epson 3880, Epson inks and the paper was a smooth paper, not textured. While the images weren't absoloutely identical, there was no way to say one was better than the others. I know what I'm doing - I've been using Lightroom since the version 0 beta, Qimage from its first version, and versions of Photoshop from version 5.5 (which was truly dire at resizing for print!)