Differences between Iphone 4 and 5?

Why do people want it so much? (other than having the new "it thing"), like what are it's differences to the iphone 4?

-Iphone 5 is more than twice as fast as the 4.
-It has a 4'' screen rather than a 3.5''.
-New design.
-Iphone 5 has siri and the 4 doesn't. (4s does)
-LTE for faster downloads
-Longer battery life
-better front and back camera than the 4.
-Lighter, and skinnier than the 4

Those are the main things I can think of that are worth mentioning.

IPhone 4 or iPhone 4s there's a difference there. I'm going to keep it simple.

iPhone 4 Has 5 Megapixel camera and does not have siri.
iPhone 4s has a 8 megapixel camera(better than the 4) and siri.
iPhone 5 has different look, weighs less, and bigger screen. It has the same camera as 4s maybe a little better. And it has LTE. Very fast internet. And the A6 chip and it works faster than the 4 and 4s.
Pretty much it.

Two reasons that we want 5, one is the great improvements, bigger screen, faster speed higher resolution, long battery life, etc. You may compare them on the apple official site: http://www.apple.com/...e-iphones/

the other one, i think you may have noticed that apple launched the project to recycle used iphone 4/4s, the iphone users will save cost to upgrade to iphone 5, so why not?

Apple iPhone 4 Review:

* Apple iPhone 4 was officially announced and released in June 2010.

* The device is the 4th generation of the famous iPhone lineage.

* 4.5" tall and carries a more sophisticated look than the iPhone 3G and 3GS

* 0.36" thick and weighs 137g

* 3.5" LED-backlit IPS TFT, capacitive touch screen with 640 x 960 pixels and nearly 330 PPI pixel density

* runs on a 1 GHz ARM Cortex-A8 processor (Apple A4 Chipset) coupled with PowerVR SGX535 GPU

Apple iPhone 5 Review:

* launched on the 21st of September to the stores

* 6th generation smartphone

* thickness of 7.6mm

* dimensions of 123.8 x 58.5mm and 112g of weight

* internal storage would come in three variations of 16GB, 32GB and 64GB with no option to expand storage using microSD card

* 4 inch LED backlit IPS TFT capacitive touchscreen featuring a resolution of 1136 x 640 pixels at a pixel density of 326ppi

Some of the differences I found between Iphone 4 and 5. The main difference between these models is their specifications.
You can click on the given source and can view the difference between them.