Disappointing upgrade from 6 to 7

I had to upgrade for more storage. There's no perceivable difference in daily use between the 6 and 7. Not only that, but my last three iPhones have had 120Hz screen refresh rates so now when I start using this brand new iPad mini with 60Hz, it feels old just because of that. I really regret not buying the 6 with enough storage. For those of you with a 6 and enough storage, there's absolutely no reason to upgrade to the 7.