No offense, but your information is really far off :-) As I now own both devices, I can give some direct comparisons.

The pixel-density is virtually identical between the two devices. The Sharp screen is 640x480 vs. 800x480 on the Nokia. The actual height measurement of the screen is almost identical, so the 480 pixels are at almost the same dpi. The Nokia screen is simply 160 pixels wider.

Sharp = 2" 2/8 tall
Nokia = 2" 1/8 tall

As far as screen technology, the Sharp uses it's own CG technology. Sharp was really out ahead when it released this screen. As a comparision today, I'd say neither screen is clearly a winner. The Nokia has a kind of "sparkly" nature to all whites. This might mean the screen is somewhat transflective? I need to test in sunlight soon. Both have similar levels of max brightness (kind of impressive since the backlight on my Sharp is two years old). The Sharp screen has very solid whites, and all colors are extremely vivid. The Sharp screen has a very slight "screen door effect" type thing going on when at certain angles. The Nokia is less picky about viewing angle. Both are extremely great screens (and I am VERY picky).

I'm sorry my previous picure was so bad. I just took several more with side-by-sides on the two devices. I will link shortly.

I love my new Nokia, but I also love my Sharp. Both have advantages.

Here are the pictures. I did the best I could without a tripod, and will try to get some better ones later. Note that the Sharp is about 1/3" closer to the lense because of the way the hinge works, so its screen appears slightly bigger than it really is. When I first looked at the devices, I thought the screens were the exact same height....a ruler revealed that there was a 1/8" difference in height.
Screen Comparison Picture
Zoom on Screens Picture (LARGE!)
Size Comparison Picture
Thickness Comparison Picture