Windows 8 install in UEFI mode

So, what is that basically ? When i boot from my usb stick, i have the option to install in UEFI mode and in normal mode. I know in UEFI mode it makes 4 partitions, and in normal mode just 2 partitions. So basically if i install in UEFI mode i will have better windows 8 implementation and it will boot and post and run faster ? What are the advantages for installing in UEFI mode vs normal...