In the meantime until
Jeff can look into this further I thought I'd post my results FWIW.
What I get using PP v4.2 on 19 inch WIN7 HP laptop using a
screen resolution of 1600x900 with same monitor DPI 96x96 and default zoom level:

- POP Peeper v4.2 on 19 inch HP laptop
What I get using PP v4.1 on 14 inch WIN7 (older) Toshiba laptop using a
screen resolution of 1093x614 with same monitor DPI 96x96 and default zoom level:

- POP Peeper v4.1 on 14 inch Toshiba laptop
There does not appear to be nearly as much of a pronounced difference in my case between the two PP versions and considering I'm testing
with the different screen resolutions these differences are to be expected. It seems to me this would be what to expect in my opinion since higher screen resolutions items will not only appear sharper but they will also appear smaller, so more items will fit on the screen which is reflected in the higher resolution 19 inch laptop using PP v4.2 (top image). So it appears that my comparison results are relatively negligible and to be expected factoring in the differences in screen resolution of the two computers.
For further clarification,
Jeff will be checking into the forum later and will be able to provide more information at that time.

Good judgment comes from experience and a lot of that comes from bad judgment. - Will Rogers