those tests are in no way scientific. there are reports that phones have broken when dropped 3' onto carpet and just bounced when dropped of a 10' ladder. change the angle just slightly and it changes the pressure point. that's why human hands shouldn't be involved in tests like these because people think they are accurate.
I would expect the iPhone to handle drops better since it has a stainless steel frame. It can probably absorb impacts better I would imagine.I think the S10 only has an aluminum frame which is also why the S10 is lighter than the iPhone