Differences between the "Mid-2013" MacBook Air models and the "Mid-2012"

What are all the differences between the "Mid-2013" MacBook Air models and the "Mid-2012" MacBook Air models that they replaced?

MacBook  Air 13-Inch model also has major improvements in architecture, memory, graphics, connectivity, and battery life, and is offered at lower prices:

	Mid-2012 13"	Mid-2013 13"
Processor Speed:	1.8 GHz*	1.3 GHz**
Processor Type:	Core i5 (I5-3427U)*	Core i5 (I5-4250U)**
Turbo Boost:	2.8 GHz*	2.6 GHz**
L2/L3 Cache:	256k x2, 3 MB*	256k x2, 3 MB**
System Bus:	5 GT/s (DMI)	OPI
Standard RAM:	4 GB	4 GB
Maximum RAM:	8 GB†	8 GB†
Onboard RAM Type:	1600 MHz DDR3L	1600 MHz LPDDR3
Internal Storage:	128 GB, 256 GB	128 GB, 256 GB
Storage Type:	Blade SSD (6 Gb/s SATA)	Blade SSD (PCIe)
Video Processor:	HD Graphics 4000	HD Graphics 5000
Video Memory (Shared):	384 MB-512 MB	1 GB
Wi-Fi:	802.11a/b/g/n	802.11ac
Mic:	Single	Dual
SD Card Slot:	Yes	Yes
Display Size:	13.3" Widescreen	13.3" Widescreen
Display Resolution:	1440x900	1440x900
Battery Life:	7 Hours	10-12 Hours
Battery Capacity:	50 Watt-Hours	54 Watt-Hours
Dimensions:	.11-.68 x 12.8 x 8.94	.11-.68 x 12.8 x 8.94
Weight:	2.96 Pounds	2.96 Pounds
Order Numbers:	MD231LL/A, MD232LL/A	MD760LL/A, MD761LL/A
EMC Number:	2559	2632
Model Identifier:	MacBookAir5,2	MacBookAir6,2
Intro Price:	US$1199, US$1499	US$1099, US$1299

* A 2.0 GHz Core i7 (I7-3667U) processor also was available via custom order for the 13-Inch MD232LL/A configuration (which has 256 GB of flash storage by default) as a US$100 upgrade. EveryMac.com also has documented this BTO/CTO configuration as its own model.

** A 1.7 GHz Core i7 (I7-4650U) processor is available via custom order as a US$150 upgrade. EveryMac.com also has documented this BTO/CTO configuration as its own model.

† Note that RAM is soldered in place in all models and cannot be upgraded after purchase.