The Epson has clearly won.
He is much more stable, seems relatively wertig despite the processed plastic and scanned one at that really quiet.
The only drawback: When you turn off a scanning process is often driven - because I use a power strip with a switch: a gift.
The Canon looks shaky - you have to fear that soon the lid breaks out and unfortunately it sounds like a sawmill.
But the most important thing: The scans are the Epson (Details on the resolution is already sufficiently addressed in other reviews) better - even wavy watercolor illustrations he scans crisp and the colors are almost 1: 1 reproduced. Even paper texture and delicate pencil lines he gives no loss again.
The software is - though not particularly well decorated (including?) - But very clear and intuitive and could be installed on Win7 without problems.
All this, the Canon so really do not have - although it features a sleek design ...