This really happened in the Apple Store!
I was in the Apple Store about a week ago, thinking about upgrading my 6 Plus to a 6s Plus. The features themselves weren’t compelling enough, but what about speed.
So I set about putting my phone next to a display model, clearing anything in memory on both of them, then going through a raft of tests. ( turning both phones off and restarting, going through the Apple Office apps, photos and anything else I could compare)
Believe it or not my phone was faster in all the tests I ran. Anyway it was at this stage that a Apple floorwalker came up to me and said “Hi, can I help you with anything” I Said “No, not really I am just doing speed comparison tests, and mine is winning hands down”
“Ah” She says, “but these are only demo models” To which I replied, “And”
In a huff she just walked off, saying as she went, “You just keep comparing”
I was absolutely dumfounded.
BTW they were the same ios versions as well.