Hi jcass8695, I did some tests on the simulator and on my device with Safari iOS, Orion iOS, Brave iOS and Firefox iOS.
As stated by others, I found the website to be slow and to only be "painting" the page as you scroll, on all browsers in similar fashion.
I do agree Safari is probably a tad faster, but not by much.
I think it points out to a WebKit-based issue, or that this page is really big and hard to load?
It is definitely a good "stress-test" for any browser!