A53 running in 32-bit mode outperforms A7 at the same clock speed by 20-30 percent.
It is the first 64-bit Pi, which makes it more compatible with certain versions of Linux.
Even though theres the same 1GB of RAM, its gone from 450MHz to 900MHz.
The VideoCore IV graphics keeping things ticking over also sees a slight improvement from 250MHz to 400MHz.
Both are housed on a board that retains the same dimensions as the Pi 2.
Also, the rest of the features havent changed from Pi 2.
source: www.techworm.net
