The Atrix is a phone. The Eee Pad Transformer is a tablet with a keyboard dock. Neither is designed to replace a notebook or desktop computer. Maybe Transformer is comparable with low end netbooks and laptops in basic light usage.
Both run versions of the Android operating system. Your friend will not be able to install Windows image editing programs or any Windows games that he might want to play. A tiny 10.1" screen is pretty small for image editing. Don't even bother trying to use the phone screen regularly for this. He should also check to see if the Android apps can open old files that your friend created in his old image and audio editor and can save new files in a compatible format.
Transformer Reviews (You can search for the benchmarks that work on PC and Android)http://www.tabletpcreview.com/default.a ... mb+androidhttp://www.kitguru.net/site-news/highli ... iew/all/1/http://www.anandtech.com/show/5163/asus ... 3-review/1
Here are links to Super Pi and two benchmarks used in one or more of the articles.
Super Pi -- http://www.superpi.net/
Super Pi Android App -- https://play.google.com/store/apps/deta ... erPi&hl=en
Rightware BrowserMark -- http://browsermark.rightware.com/browse ... dex.action
For fun, I ran Sunspider and BrowserMark on my spare machine. I had a few browser tabs open and a Notepad window in the background.
Athlon XP 2000+, 1GB PC 3200 RAM, NVIDIA GeForce2 MX/MX400 4x AGP, Windows XP Pro SP3, Mozilla Firefox 12.0
Sunspider -- Total: 1568.8ms +/- 0.6%
BrowserMark -- Your score: 137493