The 6 and the 6S are the same size. The Plus versions are larger.
I don’t know if anyone on here is professional. The only professionals would be the ones that who work for apple or some other big technology company.
I’ve owned numerous Apple products over the years and what I’ve found out about how to get the most out of them I’ve shared on this forum.I was mostly referring to sci-fan & J. A.
They seem to be quite knowledgeable on Apple Iphone, iPad, ect.