Comparing Apple iPhone 5 64GB vs. Apple iPhone 4S 64GB

       19 Reasons for the Apple iPhone 5 64GB

Also known as: Apple iPhone 5

POWER
Slightly more battery power	1,440 mAh	vs	1,418 mAh	2% more battery power
RECORDING
A tad more microphone(s)	3	vs	2	1 more microphone(s). More microphones result in better sound quality and enable the device to filter out background noise.
CONNECTIVITY
Significantly faster downloads	100 MBits/s	vs	14.4 MBits/s	6.9x faster downloads
CAMERA
Considerably less startup delay	0.84	vs	1.4	0.56 less startup delay
Clearly more megapixel (photo, front camera)	1.2	vs	0.3	4x more megapixel (photo, front camera)
Has manual iso	Yes	vs	No	This allows to manually set the ISO level.
Substantially less shutter lag	0.24 s	vs	0.4 s	0.16 s less shutter lag. How long does the camera need to take a photo without having to focus
Has AF tracking	Yes	vs	No	With AF tracking, once you choose the subject and press the shutter release part way down, as the subject moves, the autofocus will follow it. No more out of focus shots.
Has continuous autofocus when recording movies	Yes	vs	No	When recording movies they stay focussed and sharp.
Has a dedicated camera button	Yes	vs	No	A dedicated camera button lets you taking snapshots more easily
MEMORY
Reasonably more RAM memory	1 GB	vs	0.5 GB	0.5 GB more RAM memory
PHYSICAL
Lower SAR for head (EU)	0.95 W/kg	vs	0.99 W/kg	0.04 W/kg lower SAR for head (EU). SAR (Specific Absorption Rate) describes how much radio frequency energy emitted by the device will be absorbed by your body. The rate is measured at head level. The legal limit is 2.0 W/kg in the EU.
Much thinner	7.6 mm	vs	9.3 mm	1.7 mm thinner
Somewhat less body volume	55.1 cm³	vs	60.6 cm³	9.08% less body volume
Much lighter	112 g	vs	140 g	28 g lighter
DISPLAY
Bigger screen size	4"	vs	3.5"	14.29% bigger screen size. The bigger the screen size is, the better the user experience.
Vastly higher resolution	640 x 1136 px	vs	640 x 960 px	19% higher resolution
CPU
Explicitly smaller semiconductor size/newer CPU	32 nm	vs	45 nm	28% smaller semiconductor size/newer CPU
Faster CPU clock speed	2x 1.2 GHz	vs	2x 1 GHz	20% faster CPU clock speed

 Two Reasons for the Apple iPhone 4S 64GB

PHYSICAL
Shorter	115.2 mm	vs	123.8 mm	8.6 mm shorter
Notably lower SAR for body (USA)	0.98 W/kg	vs	1.18 W/kg	0.2 W/kg lower SAR for body (USA). SAR (Specific Absorption Rate) describes how much radio frequency energy emitted by the device will be absorbed by your body. The rate is measured at hip level. The legal limit is 1.6 W/kg in the USA.