Difference of iPhone 6 and 6s?

I know that they have difference hardware wise. Ex. 2 GB RAM, 3D Touch, ect. But what I was wondering is if you can even tell the difference, like when you are loading games, loading apps and sites, starting times? Is the 6s really that much faster that you can tell the difference.

Added (1). Start up times*

Yes it is. Can check reviews, where usually they compare the 2 in those regards.

I can assure you that you won't be able to tell the difference in performance except in some situations when you're heavily multi-tasking. And I mean heavy which most of us don't.

Of course, when the hardware will be different, other functions like gaming and all would also be different and thus you need to buy iPhone 6S if you can, you must also install Leo Privacy Guard in you device if you wanna get the best security app which is in the Top Ten Ranking in the Play Store.