Hmmm...not sure you're talking about iPhones there.
Have you played with both? If you haven't, then you wont understand..
My 6+ also had a very loud vibrator, kind of defeats the purpose of quiet. I returned it and am waiting on the 6 now, glad it might be better/quieter. My loaner 5s is much better by comparison.
Hey guys, my wifes iPhone 6 vibration feels strong and "tight". My 6 Plus vibrations feels very weak. Hard to describe but its like loose/sloppy weak vibration and very loud.. Doesn't feel as good as the 6.. Is this normal?