I did some testing today. The first photo is with the Indian Creek .555 from last season. The next is the Sumtoy .562 front and back view. This was Federal #9 tss.
I know im a little high on the Sumtoy shot. Im more interested in the pattern. I didn't try 40 yds.
Very happy with either but for me the .562 wins.
On another note, that Stoger will rock your shoulder. it may be a 20ga but it hits like a 12ga.