ubuntu 64 bit performance faster than 32 bit, but only 2 gigs ram.

You have a completely different version of Xorg, Kernel, Drivers and apps. You cannot compare the 2 to say '64bit is faster'. Yes the OS may run faster but you would need to compare like for like for it to be of any value.

There are equally as many apps for 64bit as 32bit in the official repos. Where do you get that 'it has no apps'??

The 64bit apps ad kernel will utilise more of your CPU registers so CPU heavy tasks like video and audio encoding will be outright faster on 64bit but the OS as a whole will not have a drastically noticeable difference.

In principle, all things being equal, a 64-bit operating system should be faster than a 32-bit one because the processor because the processor can deal with more data in one go. This is particularly true of applications that do a lot of number crunching such as simulations and audio/video encoding. However, this effect is easily swamped by other factors.

12.04 appears faster than 12.10 in general. Many things have changed so it is not a valid comparison.

what i mean by it has no apps is because i have install no apps
i thought i should compare 12.10 to 12.10 64bit but only had 12.04 and didnt want to spend hours downloading the iso file. is there any way to revert my 12.10 32 bit back to 12.04, and can i change my 32 bit to 64 bit without losing my files.

There is no facility to go backwards under Ubuntu. If you want to install an earlier version it will need to be a clean install. You can always do a full backup first then copy your data back.

alright well if i wanted to keep all my applications anf files and settings what would i make a backup of

As a minimum you want to backup your home folder making sure you copy all hidden files and folders. This should cover the settings for most programs and all your personal files

ok now how do i find a list of all installed applications

dpkg -l > ~/Desktop/Installed\ Packages.txt; gedit ~/Desktop/Installed\ Packages.txt

Fill your boots :)