All these devices are tested in real-world situations like booting up, rendering web pages and launching apps.
The site also posted benchmarks to show the differences in performance recorded by these handsets.
However, the video seems to reveal that the contrast is less visible in real life than in numbers.
The article concedes that the iPad mini and iPad 2 have similar performances, while the 4th-generation iPad hasn’t improved the speed very much as compared to the iPad 3.
Source: iMore