@Lloydnso what does this prove
It doesn't "prove" anything. As has been explained, and as
@wyldanimal 's screen captures show, whether you should tick the "do not zoom over100%" option depends on what you want to achieve.
If you want all the girls to be approximately the same size then do not tick it - but 720p and 480p will be degraded unless you have deliberately set the size slider to a small size.
If you want the minimal degradation of low resolution clips then tick it, but 720p an 480p clips will be much smaller than 1080p, 3k or 4k clips.
We can not tell you which is the best option for you as it depends on
your preferences, what cards you have in your collection, what resolutions you have downloaded for those cards and what cards you choose to play.