There isn't much to creating a shortcut so what is in them has pretty standard info. Edgetile creators edition was really decent that way. And as Microsoft worked with Edgetile, they had a technique that increased the icon size from 96 to 254 pixels. That's the root of the problem. Microsoft was motivated to fix this to make start tiles something that worked better for them. Ultimately, they eliminated it entirely. So, it is not entirely unexpected that stardock had a different outcome. In my alternative, I was fortunate to have tile size entirely managed by the mouse wheel.. Ultimately, it proved better for me use. Oh well, CHEERS!
Norm Acunis
All edgetile does is create a series of tile images for an application. A tile image has a series of sizes and shapes (well two shapes, wide and not wide) and the content can be anything. No doubt they avoided going bigger than 254 pixels to allow space for a 1 pixel border.
It may well be that we are not loading up all tile images currently as the feature is experimental. This is something that will be enabled by default by the 1.1 release so we will be working further on it now that 1.0 is out. As you can see from the post after yours, Start11 will indeed load up tile images and they do fill the entire tile.
If you like huge icons, I should mention that the Win11 style menu lets you change icon size and the ratio to icon to spacing is considerably smaller and doesn't need you to create tiles for each of your apps either. You can even hide the label to reduce spacing yet further.