Which MacBook is better for developing in Xcode (options attached)?

Question

macbook

I choose between three models. I understand that the 2015 model should be better, but the question is how much more productive it is during development than options 1 and 2, since portability, battery life and just appearance attract more in those options. There is an additional monitor, so the screen size doesn't really matter either. Models:
1) Macbook Pro No Touch Bar 2017 13”
2.3 GHz Dual Core
Iris Plus Graphics 640 - 1536 MB
SSD 128 GB
8 GB RAM
Geekbench score: 9184 PS Only one cooler, not two like in other variants.
Price: ~28-30k UAH
2) Macbook Pro Touch Bar 2016 13”
2.9 GHz Dual Core
Iris Plus Graphics 550 - 1536 MB
SSD 256 GB
8 GB RAM
Geekbench score: 7627
Price: ~36k UAH
3) Macbook Pro 2015 15”
2.2 GHz Quad Core
Iris Intel Pro - 1536 MB
SSD 256 GB
16 GB RAM
Geekbench score: 12871
Price: ~36k UAH

Answer 1

From the presented list, obviously, the most powerful and profitable model of MacBook Pro 2015 15”:
1. RAM. 8 Gb is not enough for software development, 16 is just right.
2. Screen size. For me personally, 13.3 inches is not enough for development. I don't connect monitors.
3. In principle, the 13-inch version of 2016-2017 wins in terms of performance.
Take 15''. Otherwise, there simply will not be enough memory to work simultaneously in various IDEs and emulators.
It is not necessary to spare money for something that will make a profit)