I switched from Epson to Canon some time ago. As I am a keen photo enthusiast I have one that can scan 35 mm slides and negs plus A4 flatbed. For "normal" scanning I would go for either of the two; maybe an edge to the 210. Maybe wait a bit to see if others comment.
I had to change my scanner once I upgraded to Win 7 64bit. I got the Canon Lide 210 and it seems fine. I previously had Canon Lide35.
However, with the 210, it won't work with an extended cable nor via usb hub. It will only work via a limited length cable; I think about 2 metres max length. I did phone Canon about this and they insisted the cable can't be longer.
This means I can't have the scanner in the same place as my previous one which is a nuisance and means I need to rearrange my desk!!!