Hi guys, I've seen a lot of posts with i5/i7 comparison but it's mostly between quad-cores or even i9. Can't figure it out in this case (say RAM and storage are both on same):

1. 15.4" 2.6GHz 6-core i7 / 4.3GHz / 9MB L3 Radeon Pro 560X
2. 13.3" 2.3GHz quad‑core 8th i5 / 3.8GHz Iris Plus 655

Non-gaming usage but a lot of working with graphic (mostly 2D, a lot of layers, objects, multiple heavy-load tabs with editors, etc). Video encoding is not a major part, but very-very occasionally. Also very active browsing (simultaneously opening and closing a lot, really a lot of tabs).

The previous laptop was late 2014 MacBook Pro on i7 with Nvidia 750 I guess and looks like new Iris Plus is about the same performance.

So the price difference is only couple hundreds, in this case the main question is which one is going to operate better and more cooler. With my old MBP I've experienced that laptop stayed always warm (unpleasant warm), especially if you besides all of that would start watching some streams over Hulu, YouTube, etc at the same time.

How much is quad-core i5 Iris is cooler and quieter vs 6-core i7 560X (considering that i5 on 13.3 body that probably has less space for cooling as well) or they are both about the same?

Thank you!