After having an 2016 13" i5, then i7 and back to i5 and running the same tests, I would say the i5 runs considerably cooler doing the same things. For example, the i7 when streaming a 1080p movie from wifi got uncomfortably hot over an hour. The i5 streaming the same movie was warm but far from hot.
2016, 13" 16gb, i7.
I love everything about, the keyboard, touchpad, touchbar and the speakers are amazing for their size, although I'm envious of the richer sound the 15" get.
The only gripes are it runs much hotter than the i5 I had to return due to a display issue and the battery life.
At 100% battery it said I had 8h 19m left. After 45 minutes of youtube video it said 5 hours. If the rate is consistent to the end I'd think 4 hours while playing streaming videos would be the max.
I exchanged the i7 back for the i5 13".
Under high load it gets warm while the i7 was hot.
My non-scientific test on both laptops was having Photos launched while streaming a movie in Safari from Youtube.
Both i7 and i5 showed 8:20 when I unplugged power.
After 45 minutes the i7 showed 5 hours and change.
After 45 minutes the i5 shows 8:02 left.
The i7 discharge according to CoconutBattery stayed around 7.6 watts during this test. The i5 used 6.5 watts.
During the same test the i7 felt hot while the i5 was cool, I'd be hard pressed to even call it warm.
The strange thing is the OSX battery meter after 50 minutes says 94% capacity left while CoconutBattery says 89.4%.
Opinions on which one is more likely to be the correct one?
Between the huge difference in heat and assuming the battery indicator is accurate, battery life, the i5 seems to be the better deal, then add that in day-to-day tasks the i7 is unlikely to make any visible improvement in performance and costs several hundred $ more. Glad I went back to the i5.
*update*
USB 3.1 gen 2 cable arrived. Connected it to the Samsung T3 external drive. Copied a 1.4GB file in 3.5 seconds!!! Using a USB-C to A adapter my daily use USB memory stick took 63 seconds for the same file.
*update*
Been 3 hours since I unplugged, ran 45 minutes of streaming video tests, surfed the net, installed several applications, ran external SSD vs USB memory stick benchmarks.
- Battery at 75%
- Time on battery: 3:01
- Time remaining: 7:00
After 3 hours of fairly active usage it's looking like 10 hours with the i5!