dittoWe can't tell you that. You have to determine that for yourself. My wife uses a 6s Plus, Air 2 and a MBA. YMMV.
You can read all you want but the best way to answer your question is first hand experience. Take it for a spin and decide before your return period runs out. It's not a matter of the equipment itself. Not all 6s Plus owners are going to agree as their needs/wants/preferences are not all identical.
I use my 6S plus, air 2 and macbook
air 2 for general apps and my macbook for general web browsing as it's easier. However right before bed I would use my air 2 for that.
I use all 3 equally.