6 Plus is better in terms of specs, but the size is a deal breaker to me.

The 6 Plus has OIS, a bigger screen (which some people prefer), more resolution and ppi and also a longer battery life.

On the other hand, the 6 doesn't have OIS but it's a perfect device for one-handed use, and it also slightly outperforms the 6 Plus in benchmarks.

So, if you are used to phablets, get the 6 Plus. If you prefer one-handed use and smaller size, get the 6, and you probably will not miss the OIS anyway since smaller screen size is your priority.

Been using 6+ with Spigen Neo Hybrid case, wonder if the case is strong enough to prevent "accidental bend".