All the handsets below have their brightness turned up to the maximum, as to not to detract one display from another, in terms of their brightness and sharpness.
These begin with the former flagship Galaxy S3 (on the right) and its successor, the Samsung Galaxy S3 (on the left).
The size differences aren’t all that noticeable, with height of the two being the same – at 136.6mm.
Width has been brought down in the S4 to 69.8mm, where the S3 is 0.8mm wider.
This is with a new thinness of 7.9mm – with the Samsung Galaxy S3 coming in at 0.9mm thicker.
All that is surprising, given the inclusion of a 5-inch 1,920 x 1,080 display, compared to the 4.8-inch 1,280 x 720 screen of the S3 (both, Super AMOLED).
Under the hood, the changes are more noticeable.
There is a quad-core 1.9GHz Qualcomm Snapdragon 600 processor with 4G connectivity; 2GB of RAM; 16GB of internal storage, support for microSD cards; a 13-megapixel camera, with a front-facing 2MP version (both 1080p recording) and a 2,600mAh battery.
This is compared to the Samsung Galaxy S3, which has a quad-core 1.4GHz Exynos CPU; 1GB of RAM; 16GB of internal storage, support for microSD cards; an 8-megapixel camera, with a front-facing 1.9MP variant (1080p/720p videoing) and a 2,100mAh battery.
Next up is the latest Apple iPhone 5, with clearly a much smaller screen and overall size.
It has a 4-inch 1,136 x 640 display, and dimensions of 123.8 x 58.6 x 7.6mm – with the Galaxy S4 coming in at 136.6 x 69.9 x 7.9mm.
Side by side, the iPhone looks like a Samsung Galaxy model of yesteryear: because of the smaller screen. In fact, the very first Galaxy S (from 2010) came with a 4-inch screen (with a design not too dissimilar to the iPhone 3S).
The iPhone 5 sports a dual-core 1.2GHz processor; 1GB of RAM; 16GB of storage capacity; no microSD card access; an 8-megapixel camera and front-facing 1.2MP version, plus a 1,440mAh battery.
Following on from those images, is the HTC One (on the right) and the Galaxy S4 (on the left)
This also has a full high definition 1,920 x 1,1080 screen, only measuring in at 4.7-inches and it is of a Super LCD3 ilk.
That is a little taller than the Galaxy S4, by .08mm; slightly wider at 1.6mm and thicker, by 1.4mm.
There is the same Qualcomm Snapdragon 600 CPU driving the HTC One, only it is clocked at 1.6GHz. This is along with 2GB of RAM; 32GB of internal storage and no support for microSD cards.
It has an ultrapixel camera (4MP), with a front facing 2.1-megapixel variant – both of which can capture in HDR and 1080p.
Built-in is a non-removable 2,100mAh battery, with the mobile running from Android 4.2.2 Jelly Bean (as does the S4).
The final image is of the all handsets lined-up, starting with the Samsung Galaxy S4; the HTC One; Galaxy S3 and the Apple iPhone 5.