I dunno... I tried looking at it again, and in just the full sized image, it looks like MangaMeeya might be slightly sharper. However, when I scale it to fit my screen (19" widescreen at home and 15" standard laptop) the IrfanView just seems to be a lot easier to read for me. If MangaMeeya could scale the picture to a similar size that IrfanView does, it might make a difference (note that it probably can, but I didn't care enough to bother fiddling with all the settings).
As I said, CDisplay looks much better than MangaMeeya for me, and thinking about it it's probably because the scale is much easier for me to read.
Out of the box, with no changes to the any settings, I prefer both IrfanView and CDisplay over MangaMeeya. If I get a chance to play around with the settings in MangaMeeya I'll see if I can get something I'm happy with. If not, it's not a big deal as I'm perfectly happy with the other two.
