Now that you mention it, it's pretty much the same, but in comparing the two, the scrunchy has finer holes, about double. That shouldn't matter I wouldn't think though. Maybe I'll try both when I get my hatching eggs in January. They are all buff silkies so I only want to keep one roo and...
For doing eggshell testing, I bought these. Haven't tried them yet but will be next month.
Then, I figured since I was only going to DNA test about 4 of them, I'd just use markers for the bottom of a foot or a toe, or even their head if they were light chicks.