Samsung Galaxy S4 and Samsung J5 dual sim compared

I would like a phone which takes two SIM cards.  I am currently happy with a Samsung Galaxy S4, and so this is the benchmark for comparison.

Feature	S4 GT-I9505	J5
Dual SIM	No	Yes
SIM card size	Micro	Micro and Micro
CPU cores and speed	4 x 1.9 GHz Snapdragon 600	4 x 1.2 GHz Snapdragon 410
RAM	2 Gb	1.5 Gb
Expansion slot	microSD up to 64 Gb	microSD up to 128 Gb
Networks	2.5G, 3G and 4G	2G, 3G, 4G
OS	Android 4.2.2	Android 5.1
Display size	5.00 inches	5.00 inches
Display resolution	1920 x 1080	720 x 1280
Thickness	7.9 mm	8.50 mm
Main (rear) camera	13 MPixel 4128x3096	13 MPixel 4128x3096
Sub (front) camera	2 MPixel	5 MPixel
Other	No FM radio	FM radio!
Cost on e-Bay	Selling for £93-136.	Buy new with 1-yr warranty for £156.

And after all this manual comparison, I found it easier to compare at http://www.phonebunch.com/compare-phones/samsung_galaxy_j7-2018-vs-samsung_i9505_galaxy_s4-526/.  In fact, after seeing that website, I will probably pay an extra £27 and get the J7.