Hi Stonechat
you can't really compare the two really as one is a 12-15"backlit screen taking up half the desk the other is a tiny handheld portable which you place to your eye like a telescope or microscope.?

All I can say is that the image is clear and precise and the view is of a whole fiche page at one time.
I have sold 23 units on ebay and I have only had good feedback and praise so far.
The thing to bear in mind here is that the desktop unit is for using on a desk fixed with a 240 volt power supply.
The portable handheld is just that !.. Portable. You can take it down the library or to the local registry or on holiday or anywhere in your pocket ! Use it with your laptop perhaps.
If you are disapointed return it within 7 days in same condition for a full refund less postage .
Please direct any further enquirys to me through personal message as I am not sure it is quite fair to discuss this on the forum.
Thanks